Seiko model number fka705 serial number#

You just enter your watch serial number and caliber number and the date will be calculated. If you want to confirm the production date on a specific model there are a number of online calculators available.

Seiko model number fka705 serial numbers#

While most of the seven digit serial numbers followed the Year, Month, Production format there are some examples that seem to follow a Month, Year and Production format. This seven digit serial number continued until 1969, so there is a transition period where some models had a six digit serial and other models a seven digit. Previous to this Seiko used a seven digit serial number with a similar format. The six digit serial numbers are found on Seiko models beginning from 1966.

For movements that were produced for a long period of time they often go through various revisions and are marked with a version letter like A, B, C etc at the end of the general calibre e. This can be determined by the calibre number, as most movements were not produced for longer than a decade. As the year is only comprised of the single digit, to determine the relevant decade the model is from you need to know the period that the watch was released. Exactly how this production number was allocated between models and production runs is not clear. This indicates the example was manufactured in May 1976 and the unique production number is 2290. For example on this case number of 7005-8062 the serial number is 652290. The month is listed as 1-9 for January to September, then 0 for October, N for November and D for December. The first digit indicates the year, the following character the month and the remaining 4 digits a unique production number. Serial Number: The serial numbers on modern Seiko models are comprised of 6 digits.

Seiko model number fka705 manual#

Here are the case back examples shown in the S-14 tool manual, the tool and manual can be seen. This is usually for one piece cases and they will often state the external size of the crystal so you can identify which die to use in a Seiko S-14 one piece case opener. For some waterproof models opening instructions are included on the case back. By 1971 almost all models had changed from Proof to Resist markings. This marking changed read Water Resistant or simply Water Resist in around 1970 due to legislation changes in the US market. Water Proof: The obvious marking is present if the case is stated to be waterproof. Below are some examples from various JDM catalogs. Initially the catalogs did not list the specific caliber number for all models but this was introduced in the 1976 catalog.

Seiko model number fka705 code#

The first number is the case design code and the second is the dial code. There are a pair of numbers presented inside. You can see the design code listed below the watch. The watch case number can be cross referenced with the Seiko JDM catalogs. The last number can indicate different distribution regions or also can represent different revisions of the case design. The 4th digit in the case number is also used to differentiate the models. For example the case number 8000 used for the 5740-8000 is a completely different design to the 8000 case used with the 6105-8000. The design code is unique when used in combination with the Caliber code. This is separated with a dash to the Design Code case type. This is broken down into two sections the first is a 2 or 4 digit Caliber Code movement number. Case Number: The next useful group of data is the Case Number. In the article they describe the different details that were shown on the case backs at that time. These codes are also occasionally stamped on the inside of the case back while the external surface remains clean.

Seiko model number fka705 how to#

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 specific case design code. In the back of Seiko watches there is a range of information presented. Caseback dating dilemma: Was this Seiko 5 Superior from January 1997 or January 2007? Limited edition Seikos are usually made within a very short time frame - perhaps not more than a few months in the year it was introduced. The current SKX series 7S26 divers are harder to date using the Seiko date indicator. SEIKO - Serial Number to Manufacture Date Decoder Simple and quick, this page allows you to determine the exact date of manufacture of a basing on the caliber and serial number printed on the bottom plate or in the edge. You also need to know the six digit serial number, with the first two digits identifying the production year and month respectively. There is considerable similarity to my recently bought SMY115 - which you gave the suffix P, which I assume means that both watches were assembled in Singapore. The replacement 7s26b caliber however, came out in late 2006 but the production calculator does not take this into consideration. вЂ» Download: ?dl&keyword=seiko+serial+number&source=