Since your serial number falls between those two numbers, you know that your watch was made in 1917 or 1918. 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). Note that we’re using the serial number from the watch movement, not from the watch case. Let’s say you have a Waltham watch with serial number 21,607,210 as shown in the photo below.
So to determine when your watch was manufactured, you will need to find where your serial number fits within the range of numbers. that would make some really long pages! Our serial number tables list RANGES of serial numbers. 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. Can’t find YOUR exact serial number in our lookup tables? Distin & Co (period of ownership by Boosey) brasswind serial numbers. Boosey & Co and Boosey & Hawkes brasswind serial numbers This list is based on a study of the surviving workshop archives of Boosey & Co and Boosey & Hawkes, now in the care of the Horniman Museum, London These tables give the earliest serial numbers recorded for each period. If you find an error, or have a baritone or euphonium produced before roughly 1970 (see serial number index) with a model number that doesn’t appear on this list or is produced outside the years indicated on this list, please let me know (see main page for e-mail). Most vintage Swiss pocket watches did NOT have serial numbers and can’t be dated by this method. Some American watch brands did not use a consistent series of serial numbers, but most of the big manufacturers did. Not all vintage watches can be dated using the serial number. You should consult the serial number table for the specific brand of watch movement you are trying to date by selecting a company from the menu on the left. The example below uses information from the American Waltham Watch Company, but that is just an example. This page contains INSTRUCTIONS for using the serial number look-up tables that are found on many of our watch company history pages.
Instructions for using our serial number look-up tables
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