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astronomical regulator

astronomical regulator

Simon Willard, Jr.
1832
astronomical regulator, no. 65

astronomical regulator, no. 65

Sigmund Riefler
1902
astronomical regulator, no. 103

astronomical regulator, no. 103

Ballou Manufacturing Company
1880-1890
astronomical regulator, no. 312

astronomical regulator, no. 312

William Bond and Son
1860
astronomical regulator, no. 394

astronomical regulator, no. 394

Richard F. Bond
circa 1867
box of nine parts for cesium beam atomic clock

box of nine parts for cesium beam atomic clock

National Company, Inc.
circa 1960
box of nine parts for cesium beam atomic clock

box of nine parts for cesium beam atomic clock

National Company, Inc.
circa 1960
cesium beam atomic clock, electronic unit

cesium beam atomic clock, electronic unit

National Company, Inc.
circa 1960
cesium beam for cesium beam atomic clock

cesium beam for cesium beam atomic clock

National Company, Inc.
circa 1960
H-10 atomic hydrogen maser

H-10 atomic hydrogen maser

Hewlett-Packard Company
circa 1965
label from H-10 atomic hydrogen maser

label from H-10 atomic hydrogen maser

Hewlett-Packard Company
circa 1965
transistorized cesium beam atomic clock

transistorized cesium beam atomic clock

National Company, Inc.
1970
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