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105 items
Telegraph Key on Metal Box
Telegraph Sounder
Cable with Many Wire Pairs
Black Rotary Dial
Large White Rotary Dial
Gray Keypad
Pair of Switches
Black Rotary Dial Desk Phone
Rotary Dial Wall Phone
Phone Receiver
Candlestick Phone ca 1900
Candlestick Phone Modified for Dial ca 1900
Microscope
Spencer Microscope 115833
Solar Microscope
Microscope Polarizers
Drawing Instruments in Leather Case
6 inch Silicon Wafer with 386 Chips
Grinnell College's First Adding Machine
Early 1900s Monroe Adding Machine
Sharp Calculator
Model EL-8159
Marchant Calculator
Clary Calculator
Electric Calculator
of 5
49–72 of 105