The back is a snap in with a mirror finish and no personal engravings. While studying this data, a pattern emerged. I prefer single-colored backgrounds because they do not distract the viewer from the watch and they are easier to adopt to the standard format. With a few minutes research I learned that Gruen watches are notoriously difficult at dating, and the best chances of successfully dating one are typically determined by the serial numbers that are usually on the back of the watch. I hope it is obvious the preceding was for Jakki's Gruen 49xxxx and case 100xxxx. I've got spreadsheets of numbers, parts of it figured out, other places where there's holes. From what I've been able to conclude so far, Gruen did serial number restarts at least twice, had some movements that ran their own serial number series in parallel with the rest of the movements, and started changing the format in the middle of the series.Next
The band is 16mm in width and never worn. Furthermore the last chapters are not written yet. In approximately 1956 the Style Numbers broke the 999 barrier. It seemed that all eyes were fixed on the future. The movements featured Gruen's 1874 safety pinion design. From lug to lug this Bulova signed case is 40mm long and wide less the crown it is 26mm.Next
Initially, Dietrich and Fred designed the watch movements in America and manufactured them in Germany. This is a vintage Gruen movement from the estate of a watchmaker. I have been helping a friend identify watches in his collection I'm a bit bolder about cracking open cases than he ; it has been a lot of fun. Serial numbers are almost always on movements, not cases. If you want to support this project, please submit pictures of your watches to the author. Were they regulated, provided by the company, etc? For exabple, If you have a Bulova watch with the stamp M3 then it was made in 1963. I hope to get these sorted out soon; at least roughly dating p.Next
In these 8 different groups of movement numbers there is serial sequence. In 1935 Fred Gruen, now 63 years old, became Chairman of the Board and Benjamin S. Your movement serial number may not be in exactly the same location as the one in the photo, but you are looking for the serial number that is on the watch mechanism itself. This isn't a real Gruen, either. There are many more chapters on the Gruen family, the Gruen Watch Co. Very unusual Art Deco style watch that will stand out in any collection. Gruen movements commonly had long shelf life.Next
I have examined a Verithin belonging to my friend, and examined photos of other movements, all of which bear a 6 digit number on the movement: I assume this is the calibre, which means nothing to me. The dial is perfect and the hands are Gruen factory. Serial numbering after about 69,000 for Assmanns went to 120,000+ after about 1904 for the Madretsch marked ones and other early movnts. Gruen Watch Serial Numbers and Production Dates Gruen watches are notoriously difficult to date. There are several ways to get an idea of when your watch was made. Even this does not provide serial number dating and there is reason to suspect that they did not use a single sequence.
I have identified 7 different serial number sequences for Gruen p. I have an old Gruen parts catalog with actual size pictures of several of the old Gruen pocket watch movements. The case serial number is 7,456,528. This gold filled case is with a snap in gold filled back with no personal engravings at all. Some Submarine models have the identification 421-725 indicating a caliber 421 movement is utilized while others marked with 426-725 indicate a caliber 426. Figure 6 shows six different calibers of movements that used that number.Next
Gruen collectors often rely on old advertisements or watch material catalogs to determine when a particular model may have been introduced, but this doesn't establish a date for a particular watch. White dial with gold markers and hands, sub second dial, signed Gruen, Verithin, Switzerland. Note the thick hands, engraved patterns and bold design of all of these watches. The case reference number is 2028. While these tables appear simple, like all Gruen research work, considerable effort was expended by these individuals to create them.Next
We identified several anomalies but undoubtedly there are others that savvy Gruen collectors will find and share with the community. One of the jewelers service marks I believe could make out watch face has gold numbers. This was made possible by the advent of square movements. So, it may not be a reliable timekeeper. Dietrich Gruen Image Courtesy Columbus Metro Library In 1894, after an economic depression had forced them out of the Columbus Watch Company, Dietrich and Fred formed a new partnership.
. As this Bulova is properly serviced expect an accurate time keeper. So to determine when your watch was manufactured, you will need to find where your serial number fits within the range of numbers. 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. More about this can be found in the tutorial. Cases and watches were often made by different companies and each usually has its own serial number.Next
There is nothing written on the ratchet wheel 2. He found that for wristwatches that used Wadsworth manufactured cases, the date a specific watch was manufactured is tied directly to the serial number of its case. The original company went under in 1958, before quartz was introduced. Your Wadsworth Date will be later than the Introduction Date. Every few months brings new refinements. I'm somewhat confused because approximate serial numbers and dates are posted at: They are not consistent with either 6 digit number mentioned here being serial numbers. I believe it's the least trustworthy of the tools.Next