Really nice old war horse that.
Will you paint over The IRR Paint?
Military Land Rovers are my main interest although im from away from an expert, but i think yours is a 3/4 ton utility truck 12v GS (General Service) vehicle and if kept original is quite a rare thing on the scene now as years ago they were ten a penny as opposed to FFR/CL so people could pick them up cheap and modify them leaving the FFR's etc original.
If you like give me the Mil Reg and ill find out more details about your truck for you.
Mil Land Rovers intrigue me greatly
Oh btw the headlight surrounds were left of as Mil Landy's have special rims around the headlight, they are prone to rotting out and as such are quite rare now, PA Blanchards sell them used, they are about £64.75 altogether shipped so be care full with yours
Best of luck