RAF Signals Vehicle, Type 456 carrying a 20 KVA Generator, used for powering English radar units during World War II.
Telegraph cables, 1865
Windows 98 installation 3½” floppy. (One of a missing series.)
Front view, railway trouble lamp, designed and manufactured by Allen D. Cardwell for Western Union Telegraph Co., 1920
Close-up of Grand Central Palace Exhibition showing Kolster Direction Finder and precision loop, 1923
RCA Photophone recording truck, interior view, August 27th, 1928.
Caspar Bauhin (Theodor de Bry), Theatrum Anatomicum, 1605.
RCA Photophone Recording Amplifier Type PA-30, 1928
Telegraphy instruction, mid 1800s
Thomas Edison in lab, circa 1880s