Chuck
great photos!
Just to be devils advocate in regard to RS #20 (R2):
How do we know that the photo in the Wagenpass is indeed of R2?
That livery, and the number 3 was used by the marketing department. Indeed that car (or more likely one looking like it) was present at the press conference for the 1973 season where the Martini and Rossi sponsorship deal was announced. So how many were there running around in the identical livery and number as a marketing exercise?
I don't know the date of the press conference but it was likely to be late 1972 early 1973 so what is the chance of that #3 car there being the 72 shown on this thread?
Assuming it is R2 in the wagenpass photo, I can't see an oil door on the photo but the resolution is poor. The Wagenpass is dated March 73, well after the Tour De Corse in Nov 72 and even in the photos of R2 in that event I can't see an oil door.
So what is wrong with the theory that R2 went to the Targa, along with R6 and R8 and a couple of other cars but did not get to run due to accident damage .
This scenario would be that all three R cars were genuine 3 litre prototypes based on 73 shells (and one would have expected them to run in prototype class).
However, interestingly, according to the entry list, initially only car #8 and car #9 were entered in prototype class - or "sport 3000". #107 was entered in "GT over 2000" along with RSR's #110, #112 and #113 and other 911's #109, #111 & #114. (for what it is worth #106 came 7th; #113 came 8th and #110 came 18th so there were plenty of RSR's and RS's there)
We know that R6 won. However maybe both R2 and R8 had accidents in practice - there are, as this thread suggests, rumors of 2 cars striking trouble - and 2 1972 shell based mules were pressed into service for the race as #9 and #107.
That would mean that R2, presumably the museum car, simply did not compete in the race, rather than it being on a 72 shell as the videos seem to show.
From the original video in the car park at practice, day 1 #107 had the same front livery as R2 shows in the Wagenpass. Maybe IT was R2 but it was replaced for the race with a 72 shell car. Presumably any press or "T" car would also be tricked up like the publicity #3 car to get the best publicity for the sponsors. So it would not necessarily be correct to assume that just because the scuttle shows mismatching centre stripes like those on R2's wagenpass that this was indeed R2.