Bidspirit auction | Keuffel & Esser Co Trough

Keuffel & Esser Co Trough Compass Instrument - Keuffel & Esser Co Trough Compass Instrument, a prominent American manufacturer of drafting and surveying instruments, likely a clinometer, barometer or gauge, features a graduated scale, a central pointer needle, and a glass-fronted metal casing, used for orienting plane tables or maps, intended to be aligned with the straight edge of a surveying table or map to establish north-south baseline, 7.25” x 2.25”, good condition, see photos. From the Dale Beeks Collection