Check the listing for details. NOS, sealed, Headset Extension Cable CW49534, PL-55/JK-26, US Army / Navy. Condition: New, Made in United States. Listed at 5.00 USD. Cable, Headset, Extension, Navy Type: C W 49534, PL-55/JK-26, US Army / US Navy NOS, SEALED Usage: These cords were primarily used by U.S. Army Air Forces and U.S. Navy aviation personnel, compatible with headsets such as the type R-14 or ANB-H1. The PL-55 plug and JK-26 socket were a standard aviation intercom connection type Manufacturer: It was made by Western Electric Co., Inc., with a manufacturing location specified as Scranton, Penna. Military Designation: Navy Type: C W 49534. Contract: It was produced under U.S. Navy contract NXSR 66804. Specifications: Length: 5 feet. Connectors: Equipped with a PL55 plug and a JK26 jack. Material/Durability: Described as "moisture and fungus proofed" with a 2-conductor neoprene jacket. .