The Mk.37 Director with SPG-25 Radar were used post-World War Two on many US Navy and allied warships. The US Navy's Western Electric x-band conical scan SPG-25 radar antenna was commonly paired with the Mark 37 gunfire director from the late 1950s. It is also referred to in some literature as a "Mark 25" radar antenna. It is often seen fit to Mk.37 directors Fletcher, Sumner and Gearing class destroyers.This version has the early open frame radar dish. A version with the later solid dish is available separately (click here).
From Wikipedia: "The function of the Mark 37 Director, which resembles a turret with "ears" rather than guns, was to track the present position of the target in bearing, elevation, and range. To do this, it had optical sights (the rectangular windows or hatches on the front), an optical rangefinder (the tubes or ears sticking out each side), and later models, fire control radar antennas. They were part of an upgrade to improve tracking of aircraft.
"The Director Officer also had a slew sight used to quickly point the director towards a new target. Up to four Mark 37 Gun Fire Control Systems were installed on battleships. On a battleship, the director is protected by 1.5 inches of armor, and weighs 21 tons."