Paget type surveyor's sextant.

Surveyor's sextant (Paget angle sextant) made by Henry Hughes and Son, London, about 1900. Black-lacquered alloy frame consisting of two circular plates, the upper having an ivorine overlay; a wooden handle, to be screwed in to the lower plate. Signed on the upper plate: H. Hughes & Son, | 59 Fenchurch St. | London. Marked on the upper plate: The Paget | Angle Sextant, | No. 753. Ivorine scale in black from 0° to 90° to 0° every 30'. The scale is read by use of a black indicating line on an ivorine index mark at the end of the index arm. There is no tangent screw or clamping screw; the index arm is moved by hand. No shades. Index- and horizon-glass adjustment by screws. The sight vane has one pinhole mounted within the frame. No box.