Head Set Type H-113/U

Head Set Electrical Type H-113/u Audiosears P/N 1413. Made in 1970 for Vietnam. Olive Drab color with rubber ear pads adjustable headband and cord with jack. Don't know what they were used for but they are a neat collector's item. They might work well with your Metal Detectors, Ham Radio? Who knows? Brand new in sealed Government Cartons