Vintage Collins Military Aircraft UHF Radio RT 742 / ARC-51BX MX-6828/AR For Sale

Very rare RT-742 (or similiar) unit that comes with the original box. Looks like it was repaired but relatively unused. It is also listed as a MX-6828/AR or 5821-788-4689. The Sub assembly is the MX number. I've sold a lot of the RT-742 and this particular one is the first I seen that has these extra codes. Couldn't find much by way of research. Very low serial number of 67. Really awesome piece for any collector or someone that would want to put a little TLC into it to get it back in the air. Untested as is - Please see photos for additional details and reach out with any questions you may have. Thanks!