The Morris Commercial J-Type 10 cwt van was launched in October 1948, powered by a 1476cc sidevalve engine mated to a three-speed gearbox. The General Post Office had traditionally been abig purchaser of Morris vans, and around 12% of all J-Types and JB vans were bought by the GPO, both for Royal Mail and Post Office Telephones fleets. Royal Mail J-Types first entered service in late 1950.
The GPO designated them as 100 cu. ft. Mailvans, although Morris Commercial advertised the J-Type as having aload capacity of 150 cu. ft. They were built to the GPO’s specification, differing from the “civilian” vans in several respects. One of the most obvious externally was the fitment of rubber wings, which necessitated mounting the headlamps and sidelamps on the side of the body instead of on the wings. Front and rear bumpers were fitted, with a strengthening bar between
