An 18th-Century brass surveying level, unsigned, the telescope with dust slides, bubble level, hinged to the limb with vertical adjustment, the compass with fine iron needle, on universal ball and socket tripod mounting, the telescope 25½ins. (64.8cm.) long.

細節

An 18th-Century brass surveying level, unsigned, the telescope with dust slides, bubble level, hinged to the limb with vertical adjustment, the compass with fine iron needle, on universal ball and socket tripod mounting, the telescope 25½ins. (64.8cm.) long.