War dating ru
This version extends the Style Number dates back to 1925!
The online version (above) also provides dates for Style Numbers as far back as 1925.
It's is also the most bullet-proof of the dating techniques.
The tables have been shown to be very accurate, and unlike Style Number Dating, there are no caveats or tricky situations. Movement Manufacture Date - This tool is limited to the 405/410/420 family of movements. The reason it's an "iffy" kind of tool is that movements can be, and often have been, swapped out of the watch and a different movement installed.
By studying literally thousands of Gruen watches, and developing techniques for dating and identifying model names (and recording every detail about each watch) we believe we have reached a significant breakthrough that will help Gruen wristwatch collectors more definitively pinpoint the age of a given specimen.
Now is a fantastic time to begin collecting Gruen watches.
If you want to learn more about the application of Style Number Dating to help understand when each of Gruen's movements went into production and stopped being used in production, check out the analysis of in the Reference Section.
It's a visual view of each movement's use of Style Numbers. It shows how many Style Numbers were associated with Caliber 311 movements and what years those Style Numbers represent.
The Style Number Dating Table has been extended back as far as it will go, which seems to be 1925.
Last year this table was incorporated into the Online Style Number Tool and the Windows software version 4.0, but the table itself wasn't published.
But from about the mid 1930s to 1958 (when Gruen ceased production of watches at their factory in Cincinnati), the number of movement calibers exploded, and the serializing of those movements took on byzantine characteristics that make Egyptian hieroglyphic look like a Kindergarten reading primer by comparison. But, ironically for some, it is a great source of fun and fascination, as the process of dating a given specimen often involves piecing nuggets of information together from far-flung resources.