Often, you can find online serial number databases that will help you narrow down the age of your watch to the year it was manufactured, or thereabouts. See if there's a free online database of serial numbers from the company When it doubt about which is which, see the note below regarding online databases. The model number may be referred to as the "style number" or "reference number," while the serial number may be listed without any sort of qualifier. You may be able to save yourself some detective work if you have your watch's papers, such as the warranty, receipt, etc. But just where is this number located? Unfortunately, it sort of depends on the watch, but here are some tips to tracking it down: If you have paperwork from the watch, the serial and reference numbers should be there The watch's serial number can, in many cases, help you track down this information in conjunction with online or company-owned databases. 182-183.Let's say you buy a pre-owned or vintage watch and want some more information on when it was made, what it might be worth, etc. " A Pictorial View of American Watchcase Factories," Andrew H. " The Star Watch Case Co., Jack Linahan, NAWCC Bulletin, No. Niebling, Whitmore Publishing, Philadelphia, PA, 1971. History of the American Watch Case, Warren H.
Back issues of the NAWCC Bulletin are also available online to NAWCC members who are currently logged in. ReferencesThe following books, and NAWCC Bulletin back-issues, are available to members on loan by mail from the NAWCC Lending Library, using the Lending Library Form. See the Case Material Encyclopedia article for an explanation of the terms. Gold-Filled case, guaranteed for 10 years prior to 1924, 10K Rolled Gold Plate thereafter.
Gold-Filled, guaranteed for 10 years around 1906 decades later, chrome plated base metal Gold-Filled, guaranteed for 20 years as late as November 1906, 25 years by April 1909
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