This thread is going all over the place..I think its great
Re: tyre treads ... Ive seen a few different tread patterns on British WD tyres from WW2 . Having been mixed up with quite a few WOT2's and Morris CS8's , the brands and treads found on these vehicles can be rather odd . I've got a Morris CS8 wreck with INDIA branded tyres (mentioned by Richard F ) and the W/I\D markings .
Getting back to the antenna base. Another one is seen on this Ford ? van
http://www.awm.gov.au/collection/127803/