WTJ…L is a Lancashire reg no for February 1973, with XTJ registered in March 73 and YTJ in April 73, so as Graham says there is something of a question mark about this Marathon’s reg plate, although it does seem to appear in the August 73 Comm Motor article! The spec sheet shows the first 6x4 TL12 unit as a 74 build and the 335 ■■■■■■■ as a 76 build. Franky.