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125
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146
147</style>
148
149<link rel="stylesheet" href="stylemob.css?v=2.4">
150
151<title>
151Seiko Serial Number Decoder. Find the date of a Seiko by serial numnber</title>
152<meta name="description" content="Free and simple Seiko serial number decoder and movement date finder. Enter your Seiko serial number and find when the watch was made, its value and links to manuals and info.">
153
154<script>
155var ecid = "2480";
156</script>
156
157
158<script>
159// is bot
160function geoplugin_countryCode(){
161return "US";
162}
163</script>
163
164
165
166<script src="seiko3.js?v=1.2">
167// The Seiko serial number decoder
168// Do not reuse this code without express permission
169// Please link to https://retroseiko.co.uk/seiko-serial.htm
170</script>
vendor: 1 bytes, line 170
170
171<script src="gen.js?v=1.2"></script>
vendor: 1 bytes, line 171
171
172<script src="ad/doad2.js"></script>
172
173
174<script>
175
176function fixformat(mvmnt){
177//attempt to correct for formatting errors.
178
179//people still enter full string with dash or space
180mvmnt = mvmnt.toUpperCase().trim();
181mvmnt = mvmnt.split("-")[0];
182mvmnt = mvmnt.split("+")[0];
183mvmnt = mvmnt.split(" ")[0];
184
185//if its 3 digits and the last is a, b, c then strip it
186if (/^[0-9A-Z]{2}[ABC]$/.test(mvmnt)){mvmnt = mvmnt.substr(0,2);}
187//if its 5 digits and the last is a, b, c then strip it
188if (/^[0-9A-Z]{4}[ABC]$/.test(mvmnt)){mvmnt = mvmnt.substr(0,4);}
189//If its 8 digits split off the last 4
190if (/^[0-9A-Z]{8}$/.test(mvmnt)){mvmnt = mvmnt.substr(0,4);}
191//If its 6 digits strip off the last 4
192if (/^[0-9A-Z]{6}$/.test(mvmnt)){mvmnt = mvmnt.substr(0,2);}
193
194return mvmnt;
195}
196
197</script>
197
198
199<script>
200function runcode(){
201
202if(document.getElementById('serialbox').value == ''){
203  alert('Please enter the serial number.');
204}
205else{
206
207if(document.getElementById('serialbox').value.charAt(0).toUpperCase() == 'J'){
208// goldfeather
209  alert('You seem to have entered a J code, this is not a serial number. On watches with this number you may find the serial is on the inside of the caseback rather than the outside.')
210}else{
211
212// replace initial letter O with zero
213document.getElementById('serialbox').value = document.getElementById('serialbox').value.replace(/^[oO]/, "0");
214
215
216
217if(!/^[0-9]{1}[0-9ONDond]{1}[0-9]{4,5}$/.test(document.getElementById('serialbox').value)){
218  alert('The serial number is not the correct format, it should be 6 or 7 characters, mainly numbers although the second character can be a letter (O,N or D.)')
219
220_paq.push(['trackPageView', 'Serial failed regex', {dimension1: 'Serial failed regex'}]);
221}
222else{
223
224if(document.getElementById('mvmntbox').value != ""){
225craftlink(document.getElementById('ebaysold'),'vintage',document.getElementById('mvmntbox').value);
226document.getElementById('linktxt').innerHTML = document.getElementById('linktxt').innerHTML.replace(" its ", " a Seiko " + document.getElementById('mvmntbox').value + " is ");
227}
228var statty = 'mvmt=' + document.getElementById("mvmntbox").value;
229  runSeiko(document.getElementById('serialbox').value.trim(),document.getElementById('mvmntbox').value.trim().replace(/\.$/, ""));
230
231statty += document.getElementById("statparams").value.replace('&',' | ').replace('&',' | ').replace('&',' | ');
232
233if(document.getElementsByClassName('goog-te-combo')[0]){
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235}
236if(document.getElementById('batterylink')){
237geo(document.getElementById('batterylink'));
238}
239
240if(document.getElementById('ambatterylink')){
241geo(document.getElementById('ambatterylink'));
242}
243
244document.getElementById('theinputs').style.display="none";
245document.getElementById('thelinks').style.display="block";
246_paq.push(['trackPageView', statty, {dimension1: statty}]);
247_paq.push(['trackGoal', 3]);
248// dovert(undefined,2);
249}}}}
250
251
252function checkparams()
253{
254if (gup('se') != ""){
255document.getElementById('serialbox').value = gup('se');
256document.getElementById('mvmntbox').value = gup('mv');
257loaddb(fixformat(document.getElementById('mvmntbox').value));
258}
259}
260
261function gt(lang)
262{
263if(!isNaN(lang)){document.getElementsByClassName('goog-te-combo')[0].selectedIndex=lang;}else{document.getElementsByClassName('goog-te-combo')[0].value=lang;}
264var event = new Event('change');
265document.getElementsByClassName('goog-te-combo')[0].dispatchEvent(event);
266}
267
268
269function init()
270{
271geo(document.getElementById('ebaysold'));
272geo(document.getElementById('ebaytoollink'));
273geo(document.getElementById('amaztoollink'));
274checkparams();
275
276
277var lang = gup('lang');if(lang !=""){document.getElementById('can').href += "?lang=" + lang;gt(lang);}
278// document.getElementById("serialbox").focus();
279//dovert();
280}
281
282
283
284// document.addEventListener('DOMContentLoaded',init);
285</script>
285
286
287
288</head>
289<body onload="init();domatomo();">
290
291<div class="main"><a style="text-decoration:none;" href="//serial-number-decoder.co.uk"><h1 style="text-align:center;color: #646464;margin-top: 0px;margin-bottom:0px;letter-spacing: .05em;text-shadow:2px 2px 0px #d5d5d5,5px 5px 0px rgba(0, 0, 0, 0.2);">SERIAL-NUMBER-DECODER.CO.UK</h1></a></div>
292
293<iframe style="display:none;" name="buffer" id="buffer" src="header.htm" onload="document.getElementById('displaydiv').innerHTML=document.getElementById('buffer').contentWindow.document.body.innerHTML.replace('../','');"></iframe>
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295
296<div data-nosnippet style="font-size:0.7em">
297<br>
298Clicking on links to a merchant on this site and making a purchase can result in this site earning commission. Affiliate programs and affiliations include the eBay Partner Network and Amazon associates.
299</div>
300<div class="contentwrapper">
301
302<div class="content">
303<h1>The Seiko serial number decoder</h1>
304<h2>Find the manufacture date of any Seiko watch</h2>
305
306<div>Seiko watches have a 6 or 7 character serial number on their casebacks. The second character can be a letter but the rest are all numbers. You can use the Seiko serial number in conjunction with the movement number to calculate the year of manufacture. The month and last digit of the Seiko'a date of manufacture is calculated using the serial number and then narrowed down to a decade using my database of Seiko movement manufacture dates. You will be given an eBay link to check the value, useful links such as manuals, etc and for quartz models the battery information.</div>
307<br>
308<div>
309If more than one date is returned then either I lack data for that Seiko movement or it was made for over a decade. <a href="seiko-serial-database.htm">For details of my Seiko movements list click here.</a> For information about how this actually decodes and <a href="date-a-seiko-watch.htm">how to decode a Seiko serial yourself click here</a> (also has a video showing how to find your serial number and movement).
310</div>
311<br>
312<div>
313To get the best chance of getting only one date returned it is best to enter your Seiko movement in the 2nd box. The boxes are not case sensitive. The movement can contain the letter S, which can look very similar to a 5.</div>
314<br>
315<div>Please note, the new Seiko 5 sports cannot be dated by serial number. If you have a 2019 or newer Seiko 5 sports, then the 6 digit serial is actually a production number and cannot be used for dating purposes.</div>
316<br>
317
318My related tools : <a href="//serial-number-decoder.co.uk/bulova/bulova.htm">Bulova</a>, <a href="//serial-number-decoder.co.uk/citizen/citizen.htm"> Citizen</a>, <a href="https://serial-number-decoder.co.uk/omega/omega.htm">Omega</a>, <a href="//serial-number-decoder.co.uk/tissot/tissot.htm">Tissot</a>, <a href="//serial-number-decoder.co.uk/rolex/rolex.htm">Rolex</a>, <a href="//serial-number-decoder.co.uk/breitling/breitling.htm"> Breitling</a>, <a href="//serial-number-decoder.co.uk/longines/longines.htm">Longines</a>.
319
320
321</div>
322
323<div id="ebay1">
324
325<br>
326
327
328</div>
329<div style="margin-left:10px;" id="theinputs"><img alt="Vintage seiko wristwatch back containing serial number and caliber." id='casebackimg' style="width:300px;float:right;margin-bottom:10px;" src="seiko_serial.jpg">
330<div title="6 digit number stamped on the back of the watch case." style="display:block;width:12em;float:left;"><strong>
330Seiko Serial Number</strong><br>(6 or 7 chrs): </div><input style="display:block;float:left;" type="text" id="serialbox" placeholder="Eg. 781182">
331<br><br>
332<br><br style="clear:left;">
333<div title="The first half of the longer number stamped on the back of the case. It is the part before the middle dash." style="display:block;width:12em;float:left;"><strong>Seiko Movement</strong><br>(bit before the hyphen):</div> <input  style="display:block;float:left;" type="text" id="mvmntbox" placeholder="Eg. 4006">
334<br style="clear:left;">
335<div title="Click to display the date of manufacture" style="display:block;width:10em;float:left;visibility:hidden;">.</div><br>
336<input id="submitbutton" type="button" value="Decode Seiko serial number" style="display:block;float:left;" onClick="loaddb(fixformat(document.getElementById('mvmntbox').value));">
337<br>
338<br><br>
339If this page has been useful to you please help by spreading the word on <a href="https://www.facebook.com/sharer/sharer.php?u=https%3A//serial-number-decoder.co.uk" target=_blank>Facebook</a>, <a href="https://twitter.com/intent/tweet?text=Date%20your%20stuff%20with%20this%20serial%20number%20decoder-%20https%3A//serial-number-decoder.co.uk" target=_blank>Twitter</a>, forums etc.<br>
340</div>
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342If this page has been useful to you please help by spreading the word on <a href="https://www.facebook.com/sharer/sharer.php?u=https%3A//serial-number-decoder.co.uk" target=_blank>Facebook</a>, <a href="https://twitter.com/intent/tweet?text=Date%20your%20stuff%20with%20this%20serial%20number%20decoder-%20https%3A//serial-number-decoder.co.uk" target=_blank>Twitter</a>, forums etc.<br><br>
343<div id="theresult" style="margin-left:10px;"></div>
344<br>
345<a id="ebaysold" style="font-size:1.2em;" target="_blank" href="https://www.ebay.com/sch/31387/i.html?_fpos=&_fosrp=1&LH_Complete=1&LH_Sold=1&_nkw=seiko%20vintage&_sop=1&mkevt=1&mkrid=711-53200-19255-0&siteid=0&mkcid=1&toolid=20001&campid=5338356624&customid=semv23998"><strong>Click here</strong></a> <span id=linktxt>for an idea of what its worth (via previously sold eBay items)</span>
346
347<div id="theresult2" style="margin-left:10px;"></div>
348
349<br><button onclick="window.location = window.location.pathname">Click here to date another watch</button>
350<br><br>
351</div>
352<div style="clear:both;"></div>
353
354
355<br>
356Looking for cheap watch tool kits or caseback removers ? Try 
357<a target="_blank"  id="ebaytoollink" href="https://rover.ebay.com/rover/1/711-53200-19255-0/1?toolid=20001&campid=5338356624&customid=seiktool10&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2F173696%2Fi.html%3FLH_CAds%3D%26_fpos%3D%26_fspt%3D1%26_mPrRngCbx%3D1%26_sadis%3D%26_udhi%3D%26_udlo%3D%26_fosrp%3D1%26%26_nkw%3Dwatch%2Btool%2Bkit%26_sop%3D1">eBay</a> or <a target=_blank  id="amaztoollink" href="https://www.amazon.com/gp/search?ie=UTF8&tag=snd0b-20&linkCode=ur2&customid=seiktool00&linkId=320c029a9b5d44745230d3f233c5b4a4&camp=1634&creative=6738&keywords=watch%20tool%20kit">Amazon</a>.
358<br>
359
360
361<script src='https://storage.ko-fi.com/cdn/scripts/overlay-widget.js'></script>
vendor: 1 bytes, line 361
361
362<script>
363  kofiWidgetOverlay.draw('serialnumberdecoder', {
364    'type': 'floating-chat',
365    'floating-chat.donateButton.text': 'Support me',
366    'floating-chat.donateButton.background-color': '#00b9fe',
367    'floating-chat.donateButton.text-color': '#fff'
368  });
369</script>
369<br>
370<img alt="English" title="English" src="../images/united-kingdom.png"  onclick="gt('en');" class="flag notranslate">
371<img alt="Vietnamese" title="Vietnamese" src="../images/vietnam.png"  onclick="gt('vi');" class="flag notranslate">
372<img alt="Indonesian" title="Indonesian"  src="../images/indonesia.png"  onclick="gt('id');" class="flag notranslate">
373<img alt="French" title="French" src="../images/france.png"  onclick="gt('fr');" class="flag notranslate">
374<img alt="German" title="German"  src="../images/germany.png"  onclick="gt('de');" class="flag notranslate">
375<img alt="Spanish" title="Spanish" src="../images/spain.png"  onclick="gt('es');" class="flag notranslate">
376<img alt="Thai" title="Thai" src="../images/thailand.png"  onclick="gt('th');" class="flag notranslate">
377<img alt="Italian" title="Italian" src="../images/italy.png"  onclick="gt('it');" class="flag notranslate">
378<img alt="Dutch" title="Dutch"  src="../images/netherlands.png"  onclick="gt('nl');" class="flag notranslate">
379<img alt="Swedish" title="Swedish"  src="../images/sweden.png"  onclick="gt('sv');" class="flag notranslate">
380<img alt="Turkish" title="Turkish"  src="../images/turkey.png"  onclick="gt('tr');" class="flag notranslate">
381<img alt="Filipino" title="Filipino"  src="../images/philippines.png"  onclick="gt('tl');" class="flag notranslate">
382<div style="float:right;margin-top:4px;" id="google_translate_element"></div>
383<script>
384function googleTranslateElementInit() {
385new google.translate.TranslateElement({
386pageLanguage: 'en', autoDisplay: false}, 'google_translate_element');
387}
388</script>
388<script src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>
388
389<div style="clear:both;"></div>
390
391
392</div>
393</div>
394
395<input id="statparams" type=text style="display:none;">
396<iframe name="used" id="langbuffer" src="blank.htm" style="display:none;"></iframe>
397
398
399
400<script>function loaddb(str){document.getElementById('mvmntbox').value=document.getElementById('mvmntbox').value.toUpperCase().trim();document.getElementById('theresult').innerHTML="";document.getElementById('dbf').src= "seikodbn.php?id=" + str + "&v=2";}
401function dbloaded(arr){if(arr.length > 5 ){eval(arr);runcode();}}</script>
401
402<iframe style="display:none;" id="dbf" src="blank.htm" onload="dbloaded(document.getElementById('dbf').contentWindow.document.body.innerHTML);"></iframe>
403
404
405<!-- Matomo -->
406<script>
407  var _paq = window._paq || [];
408  /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
409  _paq.push(['setLinkTrackingTimer', 750]);
410  _paq.push(['trackPageView']);
411  _paq.push(['enableLinkTracking']);
412  function  domatomo() {
413    var u="//retroseiko.co.uk/matomo/";
414    _paq.push(['setTrackerUrl', u+'matomo.php']);
415    _paq.push(['setSiteId', '2']);
416    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
417    g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
418  }
419</script>
419
420<!-- End Matomo Code -->
421
422
423
424</body>

Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.