Nice. Yep, it's more '37 than '17.
What's missing from the painting, aside from the twin-Lewis power turret that would have been
mounted on a production Pterodactyl V, is the rest of the proposed 'system': the Pterodactyl VI,
which was to have the Goshawk mounted in pusher layout and the same turret on the front.
Basically a Pterodactyl V in reverse.
The way it was to work is that the Mk VIs with their forward turret would be at the front of the bomber
formation and the rear-turret Mk Vs at the rear. Of course the enemy fighters would cooperate and only
attack from ahead and astern.
No info available on whether or not they were going to develop right and left turreted versions for
the sides of the formation.
Armament of British Aircraft 1909 - 1939 by H. F. King has nice works drawings of the Hill
and Westland designed turret, along with a full description of operation.