It is either an International-Harvester or a Reo. Definitely not a GMC.
Jacques H.

Thank you Jacques. Do you know any good source to inquire?

It's an International Harvester M139F, 5 ton 6x6.

Dave

If Dave says so, you can be sure it is the right answer!
While in the military in the IDF - Israel Defense Forces - I was a mechanic on these vehicles - albeit different versions - and they were either IH or Reo, with subtle differences in the front grille only. In short, outstanding trucks which are still waiting for a successor!! American Motors produced the newer batches, all Diesel powered by Cummins, whereas IH and Reo had huge 6-cyl. petrol engines getting as many as 6 miles to the gallon...( 38 l/100km...)Their all-terrain capabilities at full load was unbelievable, city driving...also!!
Nostalgy, nostalgy...
Jacques H.

Yes they are IH. One is preserved at the Imperial war Museum in Dexford (Cambs) and one I think in the Royal Artillery Museum In Woolwich (London).

Unfortunately both are badly light and can not be photographed.

What Jacques says is absolutely right, I visited the Firepower Museum in Woolwich earlier this year and the Honest John they have is stuck in a awkward corner of an almost totally dark room!!

I have not been to Duxford for about 25 years and I will be visiting in the next few months. I will try to get a photo of it.

Dave

Many prototypes of Dinky models are kept in Duxford. From memory :

in the military building at the very far end are :
• a split ferret
• a Centurion on it's Antar transporter Dinky 698
• an IH Honest john missile launcher Dinky 665
• an anti tank gun Dinky 617
• a Bedford QL Dinky 623
you can get a ride in a Scorpion Dinky 690 and other tracked vehicles which I can not remember

In the first building are
• a Concord not issued as Dinky
• an Avro York Dinky 704
• I think a Gloster Meteor

In other buildings one can see
• a wrecked Me 109
• several Spitfires
• a Gloster Javelin
• the searchlight for the Dinky 161a

Outside are
• a B 17
• Viscount
• Comet

etc...

There are many other items, the master piece is probably a full size B 52.

Duxford is very accessible, two minutes from the M11, it is well worth a visit, four hours is the minimum time required for the visit.