细节
A brass surveying level,
signed on the limb TROUGHTON & SIMMS LONDON, the telescope with level and cross-bubble, rack and pinion focusing, ray-shade and dust slide, the compass box with floating circle on four-screw tripod attachment -- 15¾in. (40cm.) overall length
See Illustration
signed on the limb TROUGHTON & SIMMS LONDON, the telescope with level and cross-bubble, rack and pinion focusing, ray-shade and dust slide, the compass box with floating circle on four-screw tripod attachment -- 15¾in. (40cm.) overall length
See Illustration