Exactly. The discussion about whether or not it is a replica was basically my past-time when we waited for the call. And I find the discussion about the version (although RR referred to a "version" in his brief on engine) a bit academic. The way I read the lists, 1As (at least some of them) were 1s with a retrofitted 85hp engine. Whether there were other modifications, I don't know. The challenge has an engine that is neither, so the closest one can get is DAR-1, hence my conviction that this belongs to Mate.
I hope he surfaces soon and takes the control.
Edit: He's back!