Cool find, but I wouldn't exactly expect it to do much in the terms of wondrous hardware discoveries. It is, after all - simply a prototype system from almost 20 years ago that came in between OCS and ECS, and wasn't a terribly huge step up to begin with, IMO.
In terms of a working history of the Amiga, it's a big find, though.
Well it was a bit more than an inbetween of OCS and ECS, it was basically "Amiga 2" as designed by Jay Miner and the original Amiga team.
But, not sure what state this prototype is in.