This photo popped up on another forum and its left a lot of the users a bit baffled, in large part because of how senseless it would be to make a fighter armed with only one 37mm canon in the late 30s.
The 37mm round for the AAC canon appears to match that of the one the man in the photo is holding. Also given that AAC apparently took a proactive approach to advertising, I think it makes quite a bit of sense that this aircraft model was just a sales prop for AAC.
I am wondering if anyone here has a photo of BP Joyce that could be matched with the man in this photo. Or perhaps some documents/sales info from AAC that matches this odd aircraft.