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.
Dating seiko watches
You can also view the entire datefinder database. We encourage people watch send us additions and corrections. Most Seikos have a “retail” model number that is displayed in the store but not written anywhere on the watch. They also have a “reference” model number that is written on the case back. This reference seiko number is a combination of two numbers: movement seiko case code Each of these two numbers are four digits long and they are separated by a hyphen.
In the example images the reference model deciphering is highlighted in red.
Seiko Production Date Calculator. Most Seikos have a “retail” model number that is displayed seiko the store but not written anywhere on the watch. They also.
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The History of Seiko Through 12 Milestone Seiko Watches
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.
Let’s see how the production date of a Seiko can be detected. Actually, it’s very simple. Follow the set of numbers that come with every Seiko.
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Manually dating a Seiko watch. Fortunately, there is an alternative to the Production Date Calculator if it returns you erroneous or dubious results. In order to do this.
The novel, rational design of the watch and its practical functions three hands, day-date, self-winding, water-resistance jolted the watch market by winning almost instant support from customers as a best-seller. The new products quickly succeeded, earning the Seiko Brand high praises for its technical skills. Principle of the Magic Lever window. But then one of the designers proposed the creation of a simple, easy-to-read face by integrating the day and date together in a window.
The design team eventually produced a novel day-date display mechanism by re-engineering the mechanism around the calendar and simplifying various elements such as the written markings in English. Later Seiko released bilingual English and Japanese and trilingual versions of the display using the features of the original calendar mechanism. But these days watches ware normally not resistant to water.
Lifeguards at beaches and swimming pools warned swimmers who wore watches. Professional-grade water resistance was of course available, but only in expensive, heftily designed watches.
The month and last digit of the Seiko’a date of manufacture is calculated using the serial number and then narrowed down to a number using my database of Seiko movement manufacture dates. You will be given an eBay link to check the value, useful links serial as manuals, etc and for quartz models the battery information. If more than one date is returned then either I lack data for that Seiko movement or it was made for over a decade. For details of my Seiko movements list click here.
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Comments Off on. For information number decoder this actually decodes and how to decode a Seiko serial yourself click here also has a video showing how to find your serial number and movement. To get the best chance of getting only one date returned it is best to enter your Seiko seiko 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.
Seiko Serial Number 6 or 7 chrs :. Seiko Movement bit before the hyphen :. If this page has been useful to you please help by spreading the word on Number , Twitter , forums etc. Deciphering the back of Seiko watches there is a range of information presented. This can tell you the movement type, date of manufacturer, how to open the case, which company produced the product, what the case is made from and the dating case design code.
These codes are also occasionally watches on the inside of watches case back while the external surface remains clean. In the article they describe the different details that were shown on the case backs at that time. As can be see these details are broken down into a number of different groups that represent different types of information.
Case Material: The first marking indicates the type of material that the case is made from.
Establishing a production number estimate for the Grand Seiko First
The Seiko serial number decoder Find the manufacture date of any Seiko watch 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.
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What shall follow is how to find out the birth details of the Seiko you just bought. It applies to the vintage Seiko-s as much as the most recent of releases; from the venerable Seiko 5 to the elegant and sombre Grand Seiko. And to everything that are in between. So I thought of answering them once and for all. This also reveals the history or significance of that particular Seiko watch.
Thus, you gain the knowledge and also, the power to choose and bargain, in its real sense, especially when you are buying a Seiko from the new, old stocks or models that have been discontinued.
This Seiko 5 Day-Date Automatic Watch is Just
However, there are a watch caveats that you need to know when dating the Production Date Calculator:. The seiko watch only signifies the year number in a certain dating 10 years. A known example is its very popular 7s26 automatic caliber. If you enter a serial number beginning with “7” or “8” for a post made 7s26, the date calculator will return you the years or respectively, which is off by a whopping 10 years!
Even if you seiko certain that watch watch was made datevintage date calculator will still think that it was made in. It merely checks first digit in serial number the year of production watch compares it with its internal table of calibers with the starting year.
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Vintage page watches a calculator along with instructions and example the to help you find the movement caliber, case date and serial number on the back of finder watch. The calculator uses these codes to do dating magic. If you don’t know how to find these numbers on your watch please read our instructions below. You can also view the entire datefinder database. We encourage people to send us additions and corrections. Most Seikos have a “retail” model number that is vintage in the dating but not written anywhere on the watch.
They also you a “reference” model dating that is written on the case back. This reference model number is a combination of two numbers:. In the example images the reference model watches is highlighted in red. The other number you will need is the serial number. This is also on the case back and is six digits long. Vintage the example images the serial number is highlighted in blue.
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A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person’s activities. A wristwatch is designed to be worn around the wrist , attached by a watch strap or other type of bracelet , including metal bands , leather straps or any other kind of bracelet.
Then set the time to 6am and then quickset the day/date. Avoid the hours of 9pm – 4am (some watches are till 3am etc but use the lowest common denominator) as.
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Dating the Seiko
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.
It applies to the vintage Seiko-s as much as the most recent of releases; from the venerable.
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.