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philhancock

Numbers

An early 1900’s Otis cylindrical slide rule. (A calculator)

Width about 1”

958 views
45 faves
6 comments
Uploaded on June 1, 2020
Taken on June 1, 2020

Numbers

An early 1900’s Otis cylindrical slide rule. (A calculator)

Width about 1”

958 views
45 faves
6 comments
Uploaded on June 1, 2020
Taken on June 1, 2020
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