Hi, I'm not quite sure how I got to your site, but enjoyed its content.
I worked at Norton Villiers in the early 70's and ran my own 750 Commando in endurance races, with a variety of riders.
The attached photo was taken at the Six Hour Race, Zandvoort, in 1973 showing Tom Dickie departing after refuelling and rider change. He and co-rider Clive Wall finished 2nd.
A few weeks further on, Peter Davies and Peter Lovell finished 2nd in the Spa 24 Hour Race on the same bike.
Regards, Richard Negus