拍品 312
312
RULES AND CALCULATORS
A FOUR-FOLD IVORY SQUARE-SECTION RULE WITH SCALES IN CENTIMETRES AND RHINELAND, AMSTERDAM AND LONDON INCHES - 24IN. EXTENDED, EARLY 19TH CENTURY.

細節
A FOUR-FOLD IVORY SQUARE-SECTION RULE WITH SCALES IN CENTIMETRES AND RHINELAND, AMSTERDAM AND LONDON INCHES - 24IN. EXTENDED, EARLY 19TH CENTURY.