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A complex boxwood and brass surveyor's rule by J.H. Steward
A complex boxwood and brass surveyor's rule by J.H. Steward, stamped Col. W. Verner's Complete Sketcher -- 15.2cm. wide, in leather wallet; a brass sundial; a circular calculator; a square; an octagonal slate sundial plate -- 35cm. wide; and an Odhner calculator (6)
A complex boxwood and brass surveyor's rule by J.H. Steward, stamped Col. W. Verner's Complete Sketcher -- 15.2cm. wide, in leather wallet; a brass sundial; a circular calculator; a square; an octagonal slate sundial plate -- 35cm. wide; and an Odhner calculator (6)