Did this particular 47 receive a new body-shell during the restoration in the mid 1990s? (there's also GRP mouldings for the Lancia rear light units and NACA ducts)
It's definitely an S2/47A body, but it's had extensive modifications to make it resemble a bonded chassis car. I quite like the tow hook attached to the roll cage at the RH top of the windscreen.
I also wish I had access to photos like these when I was building my car, there are so many interesting little details (front wishbones, braces from the center chassis area to rear hoop, etc).