On my 1953 plus 4, I currently have Avon HM Tourist crossply tyres marked as follows:
Bottom line: does anyone have recommendations for a radial tyre on 16 inch/ 5 inch rims for a 1950s plus 4 ? I don't rally or race so ultimate performance is hardly an issue - good, safe performance is though.
I would try Dougal or Tom at Longstone Tyres tel 01302 711123
https://www.longstonetyres.co.uk/I buy my Avon MTW tyres from them and they are very knowledgeable on the 'owd stuff & alternative specs