拍品专文
See illustration
细节
a reproduction brass compass
With folding sights and two bubble levels - 11cm. diam.; and a brass surveying compendium, with folding sight, inclinometer and levels - 8.3cm. diam. (2)
With folding sights and two bubble levels - 11cm. diam.; and a brass surveying compendium, with folding sight, inclinometer and levels - 8.3cm. diam. (2)