Porsche 917-043, the Martini International Racing team long-tail (Langheck), the "story" continues:
This auction listing details some of the background:
https://www.christies.com/en/lot/lot-1145925
Note that they are being cautious with their wording.
You can read a bit more here (see reply #12):
https://forums.autosport.com/topic/106432-porsches-in-la/
Vasek Polak is involved here, since he owned a chassis 917-044 for a while, then it seems he had the car fully built up from his extensive collection of parts, and sometime later it became a Martini liveried machine. 044 was listed as a spare chassis by Porsche.
I won't say which one is which. But it's an interesting close up look at this vintage of "state-of-the-art" race car of the time.
These Longtail models were the push to get the outright Le Mans victory through the theory that the absolute highest top speed would net the victory. And if Le Mans 1970 had been dry, this probably would have occurred.
At 37:05, you can see 917-043 at the Teloché workshop where Porsche based themselves to prepare for Le Mans. In the photo are, from left:
Anatole "Tony" Lapine (stylist)
Freiherr (Baron) Fritz Huschke von Hanstein
Frau Ursula von Hanstein (talking to Peter Falk)
Dr Ferry Porsche (wearing the hat)
Peter Falk (with the glasses) talking to Frau von Hanstein.
Also in the background is the engine cover for the actual Le Mans winner, 917-023. By this time, Ferdinand Piech had started to take over the racing operations but it should be noted the Baron with his great diplomatic skills and connections managed to steer the team through various tricky situations. He was very influential.