Hi everyone!

I recently got a new old camera, a Voigtländer Rollfilm 5x8 (picture can be seen here: http://www.flickr.com/photos/tonicito/6640128439/). The lens is a Heliar 8.3cm 1:4.5 and it is mounted on a dial-set Compur shutter speeded up to 1/300.

By the serial number on my Heliar (314325) I could date it to 1927 (through some lists of Voigtländer serial numbers available on the web). Then I tried to find out the year of my shutter as well, since lenses could be manufactured years before they were mounted on a camera. The serial number on my dial-set Compur is 44414 and, I am not sure if it corresponds to one of the standard sizes, but it is really small (maybe a #000?). I am not sure if shutters for roll film cameras follow similar size standards as the ones for large format lenses. Now, all references I was able to find in the web for Compur serial numbers (for example here: http://camera-wiki.org/wiki/Compur_serial_numbers, although all seem to take the source from Wilkinson, M, and C Glanfield. 2001. A Lens Collector's Vade Mecum) begin with 214000 in 1912.

It seems to me that the serial numbers on the dial-set Compur were not that standardized, or they followed another system...

Does anyone know a sound way to determine the age of a dial-set Compur? How old is my shutter really (I would guess sometime between 1927 and 1929, because in 1930 the first rim-set Compur shutters were used on this model...)

Many thanks in advance!
Toni