These are the known (or likely) trucks to the same Demand:
2844419324 ENGINE # WR3,840,943 S/M 2564 JULY 16 1942
2844419447 ENGINE # WR3,840,887
2844419639
2844419659 ENGINE # WR3,840,806 S/M 2564 JULY 21 1942
2844419686
2844419763
British Ministry of Supply Demand Supply-Mechanical 2564 was allocated Census Numbers Z 4923997 to 4925484, for 3/4 ton '15 cwt Office 4 x 4 Articized'. I thin k these bodies were built by Canadian Top & Body Company. It has also been suggested that there were some Breakdown bodies included in the overall Demand.
We know from Canadian figbures that 1,488 had been delivered by 1st October 1942.
As to how it ended up in NZ I can only surmise that the truck was delivered to the UK, assembled here, then shipped out to the Mid-East and issued to the NZEF. It was then 'sold' to the NZ Government and then shipped on to NZ after the forces returned. What a marvellous find, and to locate the Census Number is outstanding!