Details
An 18th-Century brass folding rule and square,
unsigned, with finely engraved scales, opening to reveal a folding arm for use with a plummet, the suspension hole located beneath the hinge -- 12.7/8in. (32.7cm.) long opened
See Illustration
unsigned, with finely engraved scales, opening to reveal a folding arm for use with a plummet, the suspension hole located beneath the hinge -- 12.7/8in. (32.7cm.) long opened
See Illustration