Yr right Roger, that does appear to be a Phantom MX tank. There's not a lot of diff in width between the Super Pioneer & Phantom MX tank. If you measure across under the 'belly' of the tanks, the S/P tank is about 11" wide, Phantom MX tank about 10". But I've just noticed that S/P tank & Desert Phantom tanks have "Ossa" painted on, not screwed in badges as per Phantom MX. (Desert Phantom tank is same as S/P tank as far as I know)