细节
A 19th-Century brass surveying level,
by W.J. Berry, the telescope with draw focusing, on limb -- 16in. (40.6cm.) long; and a mahogany case -- 18 3/8in. (46.7cm.) long
by W.J. Berry, the telescope with draw focusing, on limb -- 16in. (40.6cm.) long; and a mahogany case -- 18 3/8in. (46.7cm.) long