That is a very good hobby Dennis, I did a similar job registering the
SN "white face" 2.8F cameras in eBay and other sites trying to
establish the SN for the first 2.8F "white face" and I concluded
-writing from memory- it was about the SN 2470000, with Planar lens,
camera manufactured about 1970, I have the data in other computer at
my office and then available on Monday. We also did with Todd Belcher
a SN list about the currently known 2.8B Biometar cameras, it's a very
rare camera really.
Collect cameras at Nederland had two years ago a 2.8F Xenotar very
close to the series starting number 2950000
