Wayne Toups has an accordion with this shape too. It's a FALCON accordion and the image on the bellows is that of a bird of prey. And even though I've never gotten a close up look, I think is safe to say that it's a falcon rather than an eagle or hawk.
I have a cool story about those kinds of bellows. I saw one inside Mr. Randy's trash can and asked who's it was. Sure enough, it was Wayne's. It was really wore out. I almost kept it just to have.