Stores reference PL-170. This is an Army Air Forces version of the standard wartime RAF wiring loom jackplug as used with the T-44 microphone/loom. The casing is slighty different and the loom spring was abandoned. The T-44 alleviated the need for a throatmicrophone. Used primarily in aircraft fitted with RAF radio equipment, it enabled AAF crews with the 8th and 9th AAF to plug their American made headgear into RAF aircraft. The standard AAF helmet jackplug connecting to the JK-26 and the PL-170 bellplug to the aircraft. Excellent condition. Stock code H25240.