Robert Croswell

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1:03
Gilbert clock movement
Robert Croswell
574 views • 4 months ago
0:50
clock escapement issue
Robert Croswell
21 views • 6 months ago
1:22
IBM Master Clock
Robert Croswell
82 views • 9 months ago
0:26
IMG 1339
Robert Croswell
93 views • 10 months ago
0:22
M4H06647
Robert Croswell
36 views • 1 year ago
0:21
M4H06646
Robert Croswell
49 views • 1 year ago
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