For the players who have unlocked the skin "Siroco" in game:The base is the RBFM with 5 crew members, one machine gun on the turret and the periscope for the tank commander. The 5 crew member are really there as you can see the driver and the radio thru the open turret.The basic RBFM is replaced by the in-game texture of the Siroco, with crew and lowered cutter.The unlocked skin Siroco RBFM is replaced by the texture of the Souffleur  with crew (with hats of the French Navy) and without cutter.

Credits:
grumpf44