About Serial-Number-Decoder. This project started back in when I wrote a basic tool to cross reference the serial numbers and the movements on my personal vintage Seiko watch collection. Since then it has expanded to cover my other interests and collectible vintage equipment in general. It is now one of the most comprehensive sets of serial number decoders on the internet. Aimed at collectors, sellers, dealers and eBayers , it now covers vintage or antique Rolex, Tissot, Timex, Elgin, Casio, Citizen and Omega watches as well as Gibson, Fender and CF Martin guitars, Roland and Boss which includes all the old analogue gear and Boss pedals , Kawai and Yamaha pianos, DOD and Ibanez guitar pedals, Hot Wheels diecast models and some electronic component dating tools useful for dating vintage guitars, pedals and synthesizers. Recent additions have been tools to date and identify Apple devices as well as Samsung Galaxy and Sony Xperia mobile phones.
Deciphering Seiko Case Back Information
There are many different types of old Seiko watches, several of which hold a special place in watch making history. Seiko watches have a long and interesting history. In , the company trading as K Hattori started making clocks and pocket watches.
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Seiko founder Kintaro Hattori was only 21 years old when he opened the K. After several years of producing high-quality wall clocks, Seikosha released its first pocketwatch, called simply the Timekeeper, in The Hattori quickly recognized the growing worldwide popularity of the wristwatch and predicted that the demand for wristwatches would shortly outpace that for pocketwatches. The Laurel had a silver case, At first, the need to import components meant that production was slow — just 30 to 50 pieces per day — but by , Seikosha had managed to produce its own balance springs and by , its own enamel dials.
The Great Kanto Earthquake struck Japan in , destroying the Seikosha factory and stocks and halting production of timepieces. The use of a non-English name indicated that Hattori had become confident enough in the quality of his products that they would sell despite the widely held belief at the time that products made in the West were of superior quality.
The watch had a Its small seconds subdial was standard all the way up until , when the Seiko Super debuted as the first Japanese watch with a central seconds hand. The mechanical movement, Caliber , measured 12 lignes and had 25 jewels and a frequency of 18, vph. The watch itself had a gold-filled case, The watch, with its clean dial, long hands and applied indices, established the design codes that Grand Seiko watches still adhere to today.
Its story begins with the Olympic games, held in Tokyo, for which Seiko was the official timekeeper.
Review: Seiko 5 Sports SRPD Dive Watches
Forums Latest Auctions Members. Posts 83 Likes I was given my grandfather’s old seiko watch today.
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In a previous article that detailed the different variants of the reference that were produced over its production lifespan, we mentioned that it is generally believed no more than 36, units were produced of the model. Since the publication of that article, we have continued to undertake research to try to establish a better estimate of production numbers, and also try to get a more accurate handle on the relative numbers produced across the three major dial configurations of Printed, Carved, and Raised logo dials.
One result of this research is that we are extremely confident that we have now also successfully decoded the logic behind the movement serial numbering, something that has — to the best of our knowledge — never been documented before. Stamped on the inside of the case back of the watches can be found the case serial number. Comprised of seven characters, we explained in the previous article how the first two characters of the serial number can be used to determine the month and year of production.
Excepting production in the months of November and December where the year and month codes are reversed , the first character of the case serial number indicates the year of production, and the second the month January through to October are identified by the numerals 1 through 0, November and December are identified by the letters N and D. We discussed in the previous article how, from an examination of many examples of the reference, we had for the first time been able to establish some logic behind the counter part of the case serial number.
We also explained that it appeared that the case number counter was increasing at a faster rate than the movement counter number, thus questioning whether or not it could be used to provide a reliable estimate of production numbers. The movement serial number can be found engraved on one of the bridges of the movement. Previously it has been suggested elsewhere that the first two digits of the movement serial number can be used to provide an indication of the year the movement was manufactured.
However, as we will prove for the very first time in this article, this is not the case. It is clear that at least some of the digits of the movement serial number are a counter, but to-date we believe that no-one has ever managed to crack exactly how that counter functions over the production life-span of the reference. Without a clear and logical explanation behind the movement serial number counter, we are reliant on the case serial number counter to estimate production numbers.
The initial production of the reference — stock manufactured for the launch of the watch — took place between April and June of
By David Flett. Watch enthusiasts I mean. The thrill of opening the next box or clicking the next link to see if it might be hiding something different. Something special.
If Lorus (which belongs to Seiko group) has the same algorithm for serial numbers date by 3 most left signs of it’s serial number (provided your Lorus has serial.
The Japanese-made Seiko watches have become synonymous with detail-oriented craftmanship and durability. The sleek look and attention to detail have made these watches a favorite since when the company began as the brainchild of master watchmaker K. With such a rich history, it is no wonder that the exact production year of many of the watches is difficult to determine.
Figure out the decade you purchased your watch, or when you think your particular watch group was manufactured. Unfortunately, this information is vital to dating your Seiko as the serial number does not provide any more clues. The “movement” of the watch will help you identify the decade it was made and should be found on the case the watch came in. Refer to the Seiko Movement Table for a list of movements see Resources.
Timekeeping Icon: The Seiko 5
It has been a long-standing tradition with any watch loving man to pick up or own his ideal birth year watch. The key is to get something that was manufactured or produced during your birth year. There are others who would want a more specific down to the birth month and birth year BMBY. But a lot would just settle for the birth year.
It’s virtually impossible to date code system in wristwatches. Enter your vintage seiko series 5. Augean hilary laurelled, with detail-oriented craftmanship and.
Have you ever wondered when your watch rolled off the assembly line at the factory? In other words, when was it manufactured? Questions relating to the production date of Seikos frequently pop up in various watch forums from time to time. And if you have that knowledge, you have an edge over the seller that could be very useful. Especially when it comes to bargaining for a better price for that new, old stock NOS Seiko that caught your fancy. File photo of a typical watch store in Kuala Lumpur.
I have gotten a few discontinued Seikos in this manner, saying “Hey look, this watch is eight years old! Fortunately for me, the watch dealers relented to my counter offers and I got them for the price that I wanted.. Seikos with solid casebacks plastic, stainless steel or titanium will have the 6-digit serial number etched in a straight line. Here are three examples of Seiko casebacks depicting their serial numbers.
Type I: Seiko 5 glass display back:. Basic Seiko 5 models made from the year onwards have clear glass display backs as you can see above. The numbers are faintly stamped from the inside of the glass.
Seiko Serial Numbers Complete Guide and Date
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Rare Gents SEIKO Watch DX M SEA LION DAY DATE 60s 70s 25 jewels. £ Click & Collect. or Best Offer. FAST &.
Well, the brand certainly was ahead of the game with the SKX diving watch — released in — and it seems the rest of the industry is still playing catch up. Seiko Diver, A day at the beach for example, or as mad-keen members of the Seiko diving-watch cult will appreciate, a jungle monsoon. The reference. Willard — aka Martin Sheen in Apocalypse Now. And goodness is the SKX well-made. Right down to its 20 lab-coated watchmakers studiously tweezering together precision mechanical movements to rival any of Omega or Rolex.
Unrivalled quartz pedigree, exquisitely crafted horological masterworks… and then there are the diving watches.