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1. #WATCH SERIAL NUMBER LOOKUP HOW TO#
2. #WATCH SERIAL NUMBER LOOKUP SERIAL NUMBERS#
3. #WATCH SERIAL NUMBER LOOKUP SERIAL NUMBER#

In the grand scheme of things, these error amount are miniscule. Like so many of the Gruen tools, it is not perfect, has some amount of error, but it works most of the time. This technique provides a date with an accuracy that is +/- 1 or 2 years.

#WATCH SERIAL NUMBER LOOKUP SERIAL NUMBERS#

Table 2 - Wadsworth serial numbers 1925-1930

#WATCH SERIAL NUMBER LOOKUP SERIAL NUMBER#

The first 2 digits of the serial number are used to look up the date in Table 2 below. If you're Wadsworth Serial Number didn't have a letter G or L at the beginning, but instead has a 5, then you're in luck! You MAY still be able to find the date the case was made, if it was made between 19. His most recent Gruen article was on Tanks and can be found in the members on the NAWCC NAWCC website.

This technique was developed by Barry Cooper, co-author of the Style Number dating paper. Technique 2 - Serial Numbers that begin with the number 5

#WATCH SERIAL NUMBER LOOKUP HOW TO#

See Figure 1 below for how to read a case's serial number that has a G or L prefix. If your case is a Wadsworth case, and you find a 5 instead of a Gx or Lx at the beginning of the serial number, then you may be able to use the Cooper tables. If both of these criteria are not met, then this technique will not work for you. Jack Wood's article that described how his technique for determining the date a Wadsworth case was made was published in the Sept/Oct 2012 NAWCCĪ Gruen Wristwatch from a Wadsworth Case Serial Number" toįor this particular dating technique, two criteria must be met.ġ - The case must be manufactured by WadsworthĢ - The case serial number must start with the letter G or letter L Technique 1 - Serial Numbers that begin with the letter G or L More about this can be found in the ID You Gruen! tutorial. You will want to look further into the past when searching for detailed data about your watch. Your Wadsworth Date will be later than the Introduction Date. Advertisements and catalogs, the primary source of your identification data, will contain the newest models, not those that have been shipping for 4 or 5 years. The reason for this is simple you are most likely to find the most information published about a watch when it first went up for sale. For identification research, the critical date is the "Introduction Date", the date the watch model was first introduced to the public for sale. If you are attempting to identify your watch, that is, you are seeking the model name and other detailed information about it, then you are actually looking for a different date. Let's call this date, the date your Wadsworth case was made, the Wadsworth Date. If you want to know the exact age of your watch, then this date is what you are seeking.

The Wadsworth case date is the date the watch's case was manufactured. While these tables appear simple, like all Gruen research work, considerable effort was expended by these individuals to create them.īefore presenting the tables and techniques, a word about case dating. These techniques involve looking up a portion of the Wadsworth case serial number in a table to determine the date a Gruen case was manufactured. Both are top-notch Gruen historians and researchers.

One was developed by Jack Wood, the other Barry Cooper. There are two different case dating methods for Gruen wristwatch cases that were manufactured by Wadsworth. Another wrench (spanner for you Brits) in the toolbox is always welcomed as Gruen collectors need all the help they can get. I'm grateful that I can share with you MORE tools for your Gruen toolbelt. Dating A Gruen Wristwatch from a Wadsworth Case Serial Number