Keystone Stereoscopic Tester M1A1
LOT
718
718
Hammer Price
€360
incl. Buyer's Premium
This item is subject to margin scheme taxation and the premium is 24% if it remains in the EU
Product number:
AI_12_20560
Starting Price €300
Estimate € 500 – 600
Estimate € 500 – 600
Condition : B
Manufacture Year : c.1935
Manufacture Year : c.1935
LEITZ AUCTION
12
Keystone Stereoscopic Tester M1A1
solid American stereoscopic testing device for tele-binocular vision, constructed by Keystone View Co., all parts made of metal and with black crackle finish, heavy cast iron stand, precision adjustment for the sliding card holder engraved with rulers in millimetres and inches, the card holder is equipped with a micrometer adjustment gear shifting an airplane-shaped target from left to right. The device was very likely built for the Air force to test a pilots capacity of depth of field vision.
LEITZ AUCTION
12