[Collins] 51J-5 Receiver

[radiofox]

Does anyone know the whereabouts or fate of the 2 Collins 51J-5 recievers that were given to the US Navy and the Canadian Armed Forces (1 each)  as prototypes ? - that is what happened to them after they were given to the forces - IE were they scrapped - or sold as surlplus etc., or have they turned up in anyones collection etc. These would likely be ser. # X 1, and ser # X 3. The 3rd one - ser.#  X 2 has recently been donated to the Hammond Museum of Radio.