Wollensak Serial Numbers: Request for Known Dates

[goamules]

Just trying to help test your hypothesis, because you mentioned Optimos and Studio shutters. None of my Wollensak shutters I've checked so far have anything scratched inside. Note the serial numbers of my two studios are over 10,000 numbers apart. And the bigger number seems to be the earlier shutter!

If you meant you suppose Wollensak just dated Betax shutters with pencil or scratched dates inside, I'll pull some out.

Betax no. 2, Velostigmate IV no. 259474 - nothing scratched inside. I'll get out some more Betaxes.

[Whir-Click]

I appreciate you taking time to look, and am interested in any else you find (or don’t find!) in your Betaxes.

[rjbuzzclick]

I have a Wollensak Regno shutter with an 11” f/7.7 Luxor Anastigmat lens mounted in it. Penciled on the inside rear is what looks like either “33958” or maybe "SN3958". There are no dates in pencil, but stamped into the side of the shutter are the patent dates “May 30, 1911 - Aug 13, 1912”. The shutter came to me on a Conley XV (whole plate) which I believe dates from around 1910-1918.