The front end claw like attachment does not look like any hweel brakes I have ever seen! I have seen other wheel brakes on de Bange system guns.
Given that the attachment LOOKS like it Might be lowerable is it a "claw spade" ??
I have seen older guns with a front or axel tree mounted claw to did in as the gun starts recoil allowing a degree of automated return to battery ( position) in drawings of other guns but nothing like this before?