Description

A compass with two sighting arms, the silvered dial signed, ‘Troughton & Simms, London’, also known as a simple theodolite, the dial measuring 8.5 cm across and engraved from 0 – 90 – 0 etc, the outer elevated ring engraved from 0 -360 and reading to 1 degree. With jewelled needle and locking arm.

The side of the instrument is engraved, ‘3215 B.O.’ with crows foot motif.

The wooden case is similarly embossed, ‘3215 B.O.’ with a later marking  ‘C.O.B.’.

The Board of Ordnance ( B.O. ) was disbanded in 1855 and the instrument became the property of the Company of Engineers.