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A.C. voltmeter

A.C. voltmeter

Jewell Electrical Instrument Company
1930-1960
A.C. voltmeter, 0-10, US Navy type

A.C. voltmeter, 0-10, US Navy type

General Electric Company
1945-1960
aircraft navigational computer

aircraft navigational computer

G. Felsenthal & Sons
ca. 1940-1955
Altec Manta Ray high frequency horn loudspeaker, type MR902-16HF

Altec Manta Ray high frequency horn loudspeaker, type MR902-16HF

Altec Lansing
1986
Altec type A341A amplifier

Altec type A341A amplifier

Altec Lansing
1955-1956
anthropometric measuring tools

anthropometric measuring tools

P. Hermann
circa 1920
anthropometric measuring tools

anthropometric measuring tools

P. Hermann
circa 1920
azimuth instrument

azimuth instrument

National Electrical Machine Shops, Inc.
circa 1942
azimuth telescope

azimuth telescope

Wollensak Optical Company
circa 1943
B&K Dyna-Jet model 707 tube tester

B&K Dyna-Jet model 707 tube tester

B & K Precision
1966
Bunsen-type photometer

Bunsen-type photometer

Max Kohl A. G.
circa 1892
clastic model of a cat brain

clastic model of a cat brain

Louis Thomas Jérôme Auzoux
circa 1900
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