Right - message from the holder of the ERF archive, and as he has now put a weeks work into this, the least I can do is post the results on here for all to see.
I would like to add that none of this is anyone’s opinion, recollection, or what ‘I think is right’ - it is direct from the ERF build records, and dispels a few beliefs that I had - ie 3MW and 5MW cabs being fitted together. I do not post it with any wish to contradict what anybody else says or recalls - as Saviem says in his post, what was supposed to be, and recorded as being, was not always what actually happened…
MV
Cabs fitted during production were 2MV, 3MV, 4MV and 5MV
The first MV cabbed ERF is recorded as chassis 13263, a 2MV cabbed model 6.4 CU220 -10’1" wheelbase 4x2 tractor unit despatched ex Sun Works on the 28th Feb 1966 and destined for ERF South Africa.
The last MV cabbed ERF is recorded as chassis 23059, a 5MV cabbed model 6.8 CU310 of 18’ wheelbase 8x4 despatched ex Sun Works on the 4th Jan 1972 to I.S & P (New Zealand Dealer) for owner L.E. Elms & Sons and was registered GC3762.
MW
Cabs fitted during production were 3MW, 4MW, 5MW (edit:- and 6MW) and 7MW.
4MW
The very first recorded MW is chassis 16625, a 4MW2 cabbed model 6.6 RR220 - 13’1" wheelbase 6x4 tractor unit despatched ex Sun Works on the 4th November 1968. It was the first of a large batch of identical vehicles all UK registered PDD 173 to 199G and PDD 201 to 223G and delivered by road to Jordan Phosphate Mines Co., Amman, Jordan.
(Note - it has been reported by John on this forum that an MW cab was built at JH Jennings before July 1967 for an export eight wheel chassis powered by a Detroit V8 engine and bound for New Zealand. No record of this vehicle can be found despite exhaustive searches of the records - we can conclude this vehicle was not issued with an ERF chassis number, was not warrantied by ERF, but could still have been used for product development purposes).
The last 4MW was a LHD model MPR360.060 (64R205) Tractor Unit, despatched ex Sun Works on the 29th of Jan 1974 to the Chinese Petroleum Co. via Dunne Spencer.
3MW
The first 3MW cabbed ERF is chassis 17099, a model 6.6CU220, 12’7" wheelbase tipper/tractor despatched ex Sun Works on the 10th March 1969 via the dealer ‘■■■■■■■ Distributor Belgium’ for customer Lecoq.
The last 3MW cabbed ERF is chassis 25230, a model 6.6.CU235-SWB. Wheelbase not set, but suit 14’4". Despatched ex Sun Works on the 18th January 1973 to dealer ‘Industrial Steel & Plant’ New Zealand.
5MW
The first 5MW cabbed ERF is chassis 18714, a model 6.8.CU235 to suit 17’0" wheelbase. Despatched ex Sun Works on the 18th January 1973 to dealer ‘Cossens & Black’ New Zealand.
The last 5MW was 31490, a model MCC360.240 (64CU220) Tractor Unit despatched ex Sun Works on the 15th of April 1976 to WT ■■■■■ Haulage Ltd UK. via HLH Commercials.
7MW
The first 7MW tilt cabbed ERF was chassis 22993, a model NGC 420 - A6.4.CU335 tractor unit. Recorded as a ‘Show Vehicle’. Despatched ex Sun Works on the 1st October 1973 as a stock vehicle to ‘■■■■■■■ Distributor Belgium’ 623/629 Chausses de Haecht, Brussels 3, Belgium. This vehicle was subject to warranty claims for defects found on delivery, and on nine occasions subsequently, the last being the 10th March 1976.
The second 7MW was chassis 24684, a model NGC 420 - A6.4.CU335 LWB. 15’ 9" wheelbase. Despatched the 14th August 1973. Again recorded as a ‘Show Vehicle’ to the same distributor as above. Note the date - we can conclude that this was the first 7MW to actually leave the works.
The last recorded MW is chassis 31927, a model 7MW tilt cabbed model NGC 420 - A6.4.CU335 a 4x2 tractor unit despatched ex Sun Works on the 22nd of December 1977 to Falcon Freight, Jeddah.
Note - the last 3MW and first 5MW left the factory on the same day!. There was no overlap in production as I thought.
I hope this information is of some interest to you guys on here. A lot of effort has been put into researching it.
Edit :- see lists further down this thread for updated information.