NR versus NM
OK, so I went and looked it up.
Diesel top version is an NR, which came as NR6/8/9/10/11/12/13, if they are late enough to have open cabs they are probably NR9 or above. Mack - Lanova ED 519 cu in engine? 6 x 4, 10 or 12 ton.
The petrol-engined NM was a 6 ton 6 x 6 (why did I think 4?) and came as NM1/2/3/5/6 with the Mack EY petrol engine.
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Gordon, in Scotland
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