Apologies for the crap image but it is 'interesting'.
https://imagizer.imageshack.com/v2/1...921/A22LbL.jpg
It appears to be Jochen Rindt testing an F2 Winkellmann Racing Babham BT23C in 1968, IIRC at Paul Ricard.
Orville and Wilbour would have loveit!
:devilish:
