Auction: Clocks, Watches & Scientific Instruments - 2623MLocation: MarlboroughDate / Time: December 01, 2012 10:00AM
Description:
Three Small Brass Lenses, a Zeiss Protar 141mm f/18 on a 3-in. square lens board; an f/5.6 lens engraved Perfection Extreme Angle, 100; and a Ross No. 2 Wide Angle Symmetrical, 4 in. f/16 with a rotating five-stop disc.
Estimate $100-200
Diaphragm on perfection very stiff. Ross has no flange
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