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two watch crystals for led display

two watch crystals for led display

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Location
Currently not on view
Object Name
Two Watch Crystals for Led Display
watch crystals
Measurements
overall-from catalog card: 27.3 mm x 19.7 mm; 1 1/16 in x 25/32 in
envelopes-from catalog card: 1 3/4 in x 1 3/4 in; 4.445 cm x 4.445 cm
overall-crystal 1: 1 1/8 in; x 2.8575 cm
overall-envelopes: 1 3/4 in x 1 3/4 in; 4.445 cm x 4.445 cm
overall-crystal 2: 3/4 in; x 1.905 cm
ID Number
1992.0230.03
catalog number
1992.0230.03
accession number
1992.0230
See more items in
Work and Industry: Mechanisms
Data Source
National Museum of American History
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