The spurs are on the tortoise itself and not on the shell. If you turn the tortoise over, the spurs are just to the left and right of the tail. Sometimes on male Algerians the spurs touch the anal scutes of the plastron (bottom shell) and get worn down, so can be hard to see.
Whether this tortoise has spurs or not (some spur-thighs don't have spurs) it is still a T.g.graeca.