Linear slide rules

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Lawrence Engineering

American made wooden slide rule in good condition. Inscribed 'Lawrence engineering service, Wabash, Ind.' With original tin & cellophane cursor, all the numerals/ lettering are legible, as are the instructions printed on the back of the rule.

D Scale length: 188 mm. Significant digits: 2.9 to 3.9.

Copyright 2012, Dave Hoyer.