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Jevon, welcome to the NAWCC Message Board! Thanks for posting your GB spring regulator clock. Kurt and Steven have already provided some useful information, basically showing that the movement in your clock is one of the GB "Amerikaner" style designs. These movements made at the Freiburg, Silesia factory did not have serial numbers. The "SILESIA" stamp below the GB anchor logo indicates this is one of their better quality examples, in this instance having solid cut pinions instead of lantern pinions.
These movements were first introduced in 1906 and utilized from that time to May 1925 with the SILESIA stamp. After May 1925 that stamp was no longer used however by that time they were using letters to designate the quality and features of the movements. For example, if it had lantern pinions, the letter "H" was used. That is an abbreviation for "Hohltrieben" or lantern pinions in German. The letter "R" was used for rack strike, in German "Reschen".
The more precise dating of these clocks then relies on other features, such as the pendulum hanger. The hanger is what the pendulum is attached to, and for most GB clocks the bottom end has a trapezoidal shaped clasp that holds a similarly shaped solid piece on the upper end of the pendulum rod. This design was patented about 1892 by itself, then incorporated in a beat setting design that was patented in 1898. The first patent was a D.R.P. type that was valid for 15 years thus could be found in 1907. This has been confirmed by actual examples, and although the design was used until the GB factory closed at the end of 1932 no "D.R.P." stamp has been found after 1907. Your clock does not have the stamp so the earliest date of manufacture would be 1908.
The next thing to observe is the case design. Your clock has the same basic case as model No. 3250 as illustrated in a 1911 GB catalog for the French market:
The only real difference is that your clock is fitted with a different headpiece; note that even the gong base shown in the illustration is identical to yours. That indicates it would have been sold with a slightly different model number such as 3251. I also see that the bottom center finial is missing, you can use the design of the one shown in the illustration as being accurate for your clock and see what you can find as a replacement. I can't tell from the illustration, but many of these were half-finials, being a complete large one sawn in half lengthwise.
This case design does not appear in the 1909 or 1912 catalogs that we have available, however GB usually sold a given case design for a few years but the particular style had fallen out of favor by 1913-14. From this information we can place your clock being made between about 1908 and 1913.
The remaining identifier is the GB logo on the dial. Although your photo isn't clear, the general shape of the logo can be seen. It will be appreciated if you could post a good close-up photo of the dial logo for confirmation. If I am correct on that particular design, it has thus far been documented only on clocks made in 1910 and 1911. I would use that as the actual age of your clock.
Andy, thanks for your interest and response to LeanMFG. However, in future it will be appreciated if you would refer our users to THIS POST which contains the most comprehensive and accurate set of dating information for GB clocks yet published.Hello,
Legitimate Gustav Becker clock movements have trademark and serial number. If you do some searches online you should be able to find some websites that have serial numbers lists vs. manufacture date so you could date your clock.
Steven, thanks for posting the message I wrote regarding the Amerikaner clocks made and finished in Freiburg. What is missing from that note is that a large number (perhaps 70,000) Amerikaner type movements were finished in the GB Braunau, Bohemia factory. Those clocks all have a serial number, whereas the ones finished in Freiburg do not as I pointed out in my earlier note. In addition, most of the movements finished in Braunau were of a higher quality than any that were made in Freiburg as I will describe in the following summary regarding the Braunau "Amerikaners".Interestingly, the movement seems to have the logo found on Gustav Becker movements made at their Freiburg, Silesia factory, but also what appears to be a serial number. From he post quoted below, there should be no serial number. Perhaps John Hubby, our resident expert on GB clocks can help us out on this. (BTW, this message board is the website for learning about GB clocks and dating.)
Hi Walt, good question. Your observation is correct, if there is no serial number the movement was almost certainly made for a Freiburg clock. Regarding the solid back plate, all Braunau movements have this feature but as you noted they were also found on a number of Freiburg clocks, especially when found in an upmarket table model or bracket model case where the movement can be seen when the back is opened.HI John,
Just to clarify for my own edification, solid plates with serial numbers are from Braunau and those without serial numbers are from Freiburg. How do the cut out plates, front and back, fit into the picture?