I just found this on e-bay, number 170083689362 - NowI know this aint no R65, but I thought you guys might like to see it as it is a little unusual....

It was the official BMW show bike at Olympia in 1973, here is the bit from e-bay.....
THIS IS A "ONE OFF BIKE IN THIS COLOUR IT WAS REGISTERED BY BMW WITH THE REG PLATE BMW 50L.
THIS WAS ALSO TO CELEBRATE THE COMPANIES GOLDEN JUBILEE, FOR IT WAS 50 YEARS SINCE THE R32 HAD MADE ITS DEBUT.TO CELEBRATE THIS THE UK CONCESSIONAIRE'S ARRANGED FOR THE BERLIN FACTORY TO PRODUCE A SPECIAL ONE OFF R75/5 IN GOLD PAINT.THEY CONTRIVED TO TAKE ADVANTAGE OF THE 'L' SUFFIX USED FOR THE 1973 REGISTRATIONS TO GET THE BMW 50L.THE MACHINE WAS SHOWN AT THE LONDON EXHIBITION (OLYMPIA) IN JANUARY OF THAT YEAR.