TU77: https://www.ebay.com/itm/275083502085 (The 11/780 is visible in
That looks complete with the TM03 formatter.
That looks like it's missing the MassBus adapter. I think two RM05's shared a cabinet between them that contained the MBA logic. Not sure if a RM03's MBA will work, quite possible (I have an RM80 that is on top of a RM03 controller MBA)RM05: https://www.ebay.com/itm/284587865252
CZ