[MILITARIA]. ? [BOEING VERTOL]. A group of models and original concept artwork of the unproduced Boeing XCH-62 helicopter. Circa 1970s. Includes: 2 pieces of original concept artwork depicting the XCH-62 in action. Matted and framed. Largest, 35 x 28 ??. ? 2 models of the XCH-62, both crafted by XCH-62 designer Charles M. Wax. First is a desk-sized model, length 20?. Second model in parts, contained in large wooden box measuring 18 x 31 ? x 9 ??. Overall condition good. A proposal for a Heavy Lift Helicopter (HLH) was requested by the U.S. Department of Defense in November 1970. The design was an extremely popular one, and a prototype was completed in 1975. Due to mechanical issues the helicopter was never completely, and in 2005 was scrapped altogether. Provenance: The estate of Charles M. Wax.