I really think that may be one of Allen's models, the more I think about it, from way back in his ST.60 days. Probably gave/old/traded it to Byron maybe? With Allen's finishing methods, old AMA numbers can be changed out pretty easy, depending on how he put them on. Unless you know the specific history of the airplane, it may be a double dip in significant previous owners.
If you haven't flown it yet, get yourself some Vess 13-6 props for that Tigre .60. It's the best current production wood prop I have found for them yet.
Have fun and fly well with it,
Dan McEntee