Torres
The 'turret hole' may be for a gun turret but I suspect it is more likely to be for the astrodome - probably removed to do service as a punchbowl.
My very first flight was in the Anson - all Avgas and leather smells liberally 'enriched' with the odours of air sickness and Elsan fluid; but this was a gorgeous spring evening tour around East Anglia and was pure magic. Aaahhhhh .... nostalgia isn't what it used to be.
..and Cheetahs they were.
The manual undercarriage brought joy to the engineering manufacturer and big biceps to the unfortunate RHS occupant - 186 turns, for retraction, springs into my failing memory but it could have been more.