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					Originally Posted by Hanno Spoelstra  With mounts you mean the winch crossmember, as per Tony Wheeler's remark?:
 
 
 If Chevrolet standardised the 101-inch wb chassis, it could be used to either assemble a CGT or a 15-cwt truck. As per the manual, the chassis winch was only "optional equipment on C30, C60S, C60L":
 
 
 Being standardized, it would be easy to bolt in a winch after military service, which explains why we come across them quite often - but they are not part of the original configuration of the 15-cwt truck.
 
 - Hanno
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 Agreed Hanno,
however when they turn up they are invariably professionally fitted not some after thought bolt on by a farmer. 
My guess is these trucks were REME/ CREME late war modifications or possibly post war.