I'm thinking about purchasing a right-hand drive Series III diesel 88, British spec. The seller says the trans is non-synchro, but I haven't heard of any Series IIIs coming out of the factory with non-synchro gearboxes. However, in the pictures, I also noted that the brakes master cylinder is a single rather than the dual with booster that I'm familiar with in US-spec Series IIIs.

Is it possible that this vehicle actually does not have a fully synchronized tranny or has someone simply installed a Series IIa trans in it's place?