Note that you're looking at the "Driver" seat and NOT the passenger as this is a "right-hand" drive RSR.
Also notice how the two seats are different, the driver seat has a more pronounced lateral-support
contour while the passenger seat (far right) does not.

Contrary to what many believe, the 1973 RSR used two different Recaro seats in each car. Take a quick look
here http://www.pbase.com/image/53401912 and note the same seating configuration but this time on a "left-hand" drive RSR.