Well spotted Heli1!
For those unfamiliar with McCulloch's work ..
Jovair (originally the Helicopter Engineering Research Corporation) was established by Drago Jovanovich at Philadelphia in 1946 to produce helicopters. The firm was taken over by McCulloch Aircraft Corporation, along with its two most promising designs, the J-2 and the JOV-3.
The Jovanovich JOV-3 was a two-seat tandem helicopter originally designed by Drago Jovanovich at the Helicopter Engineering Research Corporation (HERC). When McCulloch Aircraft Corporation purchased HERC they improved the design for prospective military use and it became the McCulloch MC-4.
The McCulloch Model MC-4 was an American tandem-rotor helicopter and was the first helicopter developed by McCulloch Motors's Aircraft Division.It was evaluated by the United States Army as the YH-30 and the United States Navy as the XHUM-1.
The McCulloch MC-4