While trying to solve my timing problem with a PDP-11/83 in a BA123 system, I thought it might be time to try one of the other BA123 boxes I have. It turns out it had an M7626 CPU inside complete with 3 M7622 memory boards and the correct 5016743 usual cabinet kit and Ethernet L4 50020061 cabinet kit with the spaghetti cable harness. The cable to the DSSI cabinet kit was there as well along with a 5 part cable for the memory (only four in use of course).

One thing I am surprised about is just how few components there are on the M7662 CPU board. I see 3 inch square chips (2 with heat sinks on top) and 3 other somewhat smaller square chips (all 3 with heat sinks on top). There is also what seem to be a 114.285 MHz crystal. Is this correct? Is this the clock for the VAX CPU?