This was the Saab of Nottorp/Bengston at Le Mans 1959.
No. 43 was the Saab of Sid Hurrell/Roy North at Le Mans 1959. No.51 was the Osca of the Rodrigeuz Brothers, Ricardo and Pedro and No.52 is the Osca of Laroche/Testut.
The Hurrell/North Saab at Le Mans 1959. They found that their fuel tank was not big enough so they took the tank out of their A40 Austin and fitted that. However, the filler was on the wrong side so the punched a hole in the Saab body work at accommodate it.
More 1959 pics of other cars: http://www.ten-tenths.com/forum/showthread.php?t=110290&page=2