In 1921 the government directed that all vehicles used by government departments, with the exception of those used by the police, would be controlled by the Post & Telegraph Department (P&T). In 1923 This instruction was extended to include the purchase of all vehicles for government use. In the same year a further instruction was issued that only vehicles manufactured in Great Britain would be purchased and that no government departments other than the P&T would enquire about the purchase of vehicles from the vehicle agents. By March 1925 the P&T had 461 motor vehicles in service; this included 225 trucks and vans spread across 10 locations.

An International platform truck that entered service in 1924; it appears to be the last one for many years that was not sourced from Great Britain. The cab and tray were built by the P&T workshops in Wellington. It had a 4-cylinder 24hp engine and a payload of 11/2 ton.

Although a foot pedal was fitted, the service brake operated on the rear wheels only. Publicity material of the day says that ‘for the convenience of the driver both the emergency brake and gear change levers are fitted in the centre of the cab‘. The fuel tank was fitted in the engine cowling behind the engine.