[maple_leaf_eh]

I tend to agree that it looks more like an aircraft engine mount than an AFV piece. The lugs and small mounting plates INSIDE the circular perimeter were the first clues. Why make a circular track for a travelling fitting, but leave obstacles?

Which aircraft is another question, but there are active warbird restorers who might need something like that for a project. Look at the tremendous investments in DH Mosquito builds over the last decade. One in New Zealand and another in British Columbia. The youtube of the pilot describing how to handle their 'Mossie' is fascinating.