细节
A 19th-Century brass and steel pocket drawing set,
with protractor, boxwood scale, ivory scale and sector, the latter signed Martin London, in fishskin-covered wood case -- 67/8in. (17.5cm.) long (2)
with protractor, boxwood scale, ivory scale and sector, the latter signed Martin London, in fishskin-covered wood case -- 67/8in. (17.5cm.) long (2)