Details
An 18th-Century brass combined sector and square,
signed Butterfield Paris, with engraved scales, hinged locking arm and drilled for use with a plummet -- 6in. (15.3cm.) long opened
See Illustration
signed Butterfield Paris, with engraved scales, hinged locking arm and drilled for use with a plummet -- 6in. (15.3cm.) long opened
See Illustration