I agree that it's an A11 or A14, but more probably an A11. It looks like
it's just the central electronics module (CPU, I/O? memory?) at the base
of the rack; can't tell what's in the middle of the rack except for the
QIC drives. The right-hand monitor looks like a T27. The left-hand
monitor is of a later vintage, but don't know the model.
Paul