All the Submarine wristwatch cases that I have seen carry the same number 3305913 and a shorter three of four digit number. The number 3305913 appears to be a case design reference number, the shorter number seems to be a serial number for the specific watch. The case measures a shade under 35mm diameter, about 34.8mm. This is a typical case size for a Great War era wristwatch with a 13 ligne Swiss movement.
Tavannes Wristwatch Serial Numbers
MOVEMENT NUMBER: Some movements are serialized! Brands will input any notes that they have on the watch during take in and the movement is no exception. This helps them document what specific movement and movement serial number was inside your watch. Movement numbers can sometimes tell us the batch in which the caliber was made.
Not all vintage watches can be dated using the serial number. Some American watch brands did not use a consistent series of serial numbers, but most of the big manufacturers did. Most vintage Swiss pocket watches did NOT have serial numbers and can't be dated by this method.
Many watch companies made hundreds of thousands of watches, and some companies made millions of watches! It would be impractical to list the individual serial numbers of EVERY watch made... that would make some really long pages! Our serial number tables list RANGES of serial numbers. So to determine when your watch was manufactured, you will need to find where your serial number fits within the range of numbers.
Let's say you have a Waltham watch with serial number 21,607,210 as shown in the photo below. Note that we're using the serial number from the watch movement, not from the watch case. Looking at the table of Waltham serial numbers (see example below), you can see that number 20,900,000 was made in 1917 and 21,800,000 was made in 1918 (marked in red in the table below). Since your serial number falls between those two numbers, you know that your watch was made in 1917 or 1918. 2ff7e9595c
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