The compass glass is 8 1/2 inches wide. The gimbal ring is 12 inches. Measuring the outside gimbal ring pins from outside edge to outside edge, it measures 13 1/4 inches. The liquid-filled compass has a larger bubble than usual, but remains fully functional. The compass card is marked “RITCHIE U.S.A.” Two non-original lights were added to this binnacle, one in the helmet and the other in the main housing, each with its own electrical cord. These lights are not original, but functional and make for a beautiful, well lit compass.

The powder-coated aluminum housing measures 52 1/2 inches tall, 33 inches wide, and 14 1/2 inches in diameter.  The helmet glass measures 8 1/2 inches wide and the red and green powder-coated steel balls measure 6 inches wide. The calibrating tube on the rear of the binnacle has the original cap, which is extremely rare.

Marked: “MARK IV PROJECTOR BINNACLE  MFG. BY E.S. RITCHIE & SONS INC. PEMBROKE MASSACHUSETTS  SERIAL NO. P. 104”

This projector binnacle will be shipped disassembled in several boxes.