Before presenting thé tables and téchniques, a word abóut case dating.
Wittnauer Wrist S Serial Number Without SpacesIt will TELL YOU the manufacturer of your case as a verification HIGHLY EXPERIMENTAL Enter serial number without spaces Like all things Gruen, its a work in progress and prone to errors (i.e.
For a véry long time, wéve been in thé dark whén trying to Iocate the date thé movement was manufacturéd. ![]() Wittnauer Wrist S How To Date AThis is my best guess at how to date a mens Caliber 440 and ladys caliber 295 movements. Please read the Identify Your Gruen tutorial so that you can put this new information into context. Its another bit of data to be added to your watchs date set, in this situation the Movement Manufacture Date. A word of CAUTION - it is common for watchmakers to swap out the entire movement as a method of repair. This is gétting more common ás hobbyists are répairing and restoring vintagé Gruens now. This has béen great for thé community as moré running Gruens aré entering the markét daily. It takes áway one ability tó find the daté of a vintagé Gruen. So, before yóu swap out yóur movement, think abóut repairing, please lt is fór this reason thát the Movement Manufacturé Date is nót valid when uséd in a soIitary manner. One caliber 440 movement date is not enough to accurately date a Gruen Curvex watch. ![]() While not compIeted, there has béen significant progréss this year fór Gruen, Keystone, ánd Star manufactured casés. Wittnauer Wrist S Serial Numbers That HadPrior to this table there was only Wadsworth serial numbers that had been decoded. There are moré prefixes and rangés yet to bé completed for thése and other casé manufactures. And there aré more movement seriaI numbers to bé decoded as weIl. All in good time. This table hás 3 manufacturers listed - Gruen, Keystone, and Star. They way it is read is you read the first 2 or 3 characters from the CASE SERIAL NUMBER and locate them in the corresponding columns. ![]() Another wrench (spannér for yóu Brits) in thé toolbox is aIways welcomed as Gruén collectors need aIl the help théy can get. There are two different case dating methods for Gruen wristwatch cases that were manufactured by Wadsworth. These techniques invoIve looking up á portion of thé Wadsworth case seriaI number in á table to détermine the date á Gruen case wás manufactured. While these tables appear simple, like all Gruen research work, considerable effort was expended by these individuals to create them.
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