Rare Patented Ships Compass Corrector
Very unusual item. It holds the metal compensating rods used to adjust a ship's magnetic compass that has been thrown off by the vessels metal construction.
Made of wood and brass fittings, there are two sets of small holes, with the sets being at right angles to each other.
The corrector box would hold the rods and magnets used to "swing" the compass on a large steel hulled vessel. While a magnetic compass is usually mounted in a binnacle there are occasions when it is suspended overhead from brackets in a gimbal.
I believe that WF Stanley held Patt. 1135 for a "moulded type corrector".
Comes with two ships vintage pulley wheels.