Hiller YOH-5A '624206' (really 62-4207)
Hiller entered it's model FH-1100 in to the U.S.Army's 1960 LOH (Light Observation Helicopter) competition, in which the type was designated as the OH-5. The competition was eventually won by the cheaper Hughes OH-6, but the FH-1100 went into production for the civilian market and the Royal Thai Police, with production continuing until 1973.
Built with the serial 62-4206, this machine was reserialled as 62-4207 when it was discovered that the serial of the first aircraft in the batch, YOH-4A 62-4201, clashed with a VC-140 Jetstar. The new serials, although allocated, were never applied and the aircraft remains painted as '624206', which is technically inaccurate, but historically correct!
Stored in Building 6008.
U.S. Army Aviation Museum.