Antenna, Localizer/Glide Slope, USSR, similar to USAAF AS-27/ARN-5 Victor as used in the US

as used in the US Navy's Patrol Bomber and Sub Chaser the Lockheed P-2 Neptune (see photo of page from the P2V7 Neptune flight manual dated 1961 depicting the instrument location on the cockpit panel with a red dot)

The serial # prefix starts with AF-43

25in diameter and ~ 2

can send the Rebecca operator a coded message by depressing a key provided for that purpose

According to Andrea Salimbeti's website:

Antenna, Localizer/Glide Slope, USSR, similar to USAAF AS-27/ARN-5 Victor as used in the USThis is a 1940's vintage aircraft navigational antenna combining the functions of Localizer (aft pointing U shaped antenna) and Glideslope (straight, lateral antenna), very similar to AS 27A of the ARN 5 system used in bomber and transport aircraft of the US Army Air Force. However, on the underside of the base Russian Cyrillic characters are stamped in the metal, evidence of possible USSR origin.