[LargeFormat] rotar V lensboard

[José López]

Hi,

Well the lensboard is a heavy rectangle of 6 1/2" x 4
1/2", maybe 1 millimeter thick made with copper or 
brass. It says Bausch & Lomb Optical Co. Protar V
10x12 and was made in Rochester US. Has no shutter
and serial number is 3229697. Somebody told me that
could be from 20's.
The iris is firmly fixed to the board and front and
back lens can be unscrewed.

Any help to find out what camera used such lensboard
will be very appreciated.

Thanks for your time.

Jose Lopez