Chassis plate for 1000 Pick-Up

[CLSpinks]

Greetings from Johannesburg, South Africa
I have recently come upon an (approx 1958-59) Minor 1000 Pick-Up with a strange chassis number of "OFH 2/ 94/43".
The present owner thinks this vehicle was at some stage imported into South Africa from Rhodesia (now Zimbabwe).
I have been reliably assured that no Minor Commercials were ever assembled from CKD kits in South Africa. Most were direct imports from the UK. Only the Rhodesian-assembled vehicles we have seen here carry the third letter "H" on their chassis number prefix - denoting "Primer" as the paint reference.
The NMP plate on the floor of the Pick-Up's engine compartment has a rather indistinct number of Z 23340 (or possibly Z 25540). but the second number is totally illegible. The usual number plates high up on the bulkhead are unfortunately missing.
At present the Pick-Up is fitted with an 803cc A-Series engine and rounded-back seats, as per Series II vehicles, but there is no guarantee that these are original.
Could anybody please assist in accurately determining the origins of this vehicle?
Regards,
Chris Spinks Johannesburg, South Africa email: spinks@telkomsa.net