Sal ar C'hroari Tripod, ar Gemene

Sal ar C'hroari Tripod, ar Gemene, originally uploaded by Rhian vK.

'Jeu de Paume' was the French precursor of lawn tennis, the players hitting the ball with the palm of the hand, and the name now denotes 'real tennis'. The game was later played with gloves, then bats and finally rackets.

I wonder which form was being played here?