$30
Cased Brass and Steel Paraboloid Condenser, Carl Zeiss, early 20th century, of typical form with brass eyepiece and steel body, box contains steel plate with two apertures marked 1. 0 and 1.1, ht. 1 1/8, lg. of plate 2 3/8 in.
Auctioneer:
Skinner
Date:
2011-10-12