That's a Mk 2A, Paolo. I'm not positive, but it looks like 1031, driven by Andretti/Bianchi at Le Mans in 1966. Can anyone confirm?
The original version of the Mk 2 (later known as the 2A) had two luggage boxes at the rear; the spare tire and oil tank were located at the front of the car. It wasn't until Sebring 1967 when a few of the Mk 2s moved one of those luggage boxes from the rear of the car to the left side of the cabin, allowing the spare tire to be moved to the left rear of the car. Also relocated was the (smaller) oil tank, now just to the rear of the fuel pumps at the left side of the engine. A slightly larger coolant radiator was fitted to the 2B, offsetting the lack of cooling due to the lower volume of oil in the tank.
Best,
T.