Example #2 6309-576A 2D5822 Mvmt-Case Serial 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 model number is a combination of two numbers: • movement caliber • 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 number 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. In the example images the serial number is highlighted in blue.

Every watch has a unique combination of reference model number plus serial number. Example #3 7S36-03J0 411082 Mvmt-Case Serial The first digit of the serial number tells you the last digit of the year the watch was made. Looking at the example images: • for example #1 the year ends in 0 • for example #2 the year ends in 2 • for example #3 the year ends in 4 You may notice this does not tell us which decade. That is why we also ask for the model number. For many of Seiko's movements we know the first year they were produced and for most movements they were produced for less than 10 years. This helps us narrow down the decade.

Using this additional information we can update our three examples: • the 6119 was first made in 1970 so #1 is from 1970 or 1980 • the 6309 was made from 1976 to 1987 so #2 is from 1982 • the 7S36 was first made in 1996 so #3 is from 2004 or 2014 The second digit of the serial number is also useful. It tells you the month the watch was manufactured. Here are the possible values: 1 = January 2 = February 3 = March 4 = April 5 = May 6 = June 7 = July 8 = August 9 = September 0 = October N = November D = December The remaining four digits of the serial number indicate the production number for the watch. If your last for digits are 0000 then you have the first watch made for that model reference number.

Filed in December 10 (1947), the ORIS covers WATCHES AND CLOCKS AND PARTS THEREOF Log In Sign Up. Find a Lawyer; Ask a Lawyer. /number(s) 150% Enlargement. Design Searches. 260301 - Ovals as carriers and single line borders. Published for Opposition Date. 9 FILED/CHECK RECORD FOR SEC. 8: 1999-08-13: REGISTERED - SEC.

Returning to our examples and using the second digit from the serial number we get the following production dates: • The 6119-8083 061187 was made in June of 1970/1980 • The 6309-576A 2D5822 was made in December of 1982 • The 7S36-03J0 411082 was made in January of 2014 I know example #3 was not made in 2004 since I bought it new in 2014. Example #3 7S36-03J0 411082 Mvmt-Case Serial Why Do We Ask for the Case Code If you were paying close attention you may have noticed we asked for the case code in the form above but we did not mention using it when calculating the date.

You can leave that field blank and still find the date for your watch however if you complete the field we will provide a listing of watches from our Seiko catalogs that match the movement and case code. • • • • • Special Thanks What you see here is in large part thanks to this excellent Quartzimodo article. Unfortunately the Jayhawk Production Date Calculator (by ) which is linked to in the Quartzimodo article no longer seems to be available, so we built our own. Another useful resource we found during our research was on the Retro Seiko website. It does not seem to be as well known and we hope that our movement database is more complete and that our instructions are more helpful.

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