Just to save some confusion, Lady Richter should read Ladi Richter - what a difference a letter makes!
Met Sonny Angel at last years TT, he brought the first Yamaha to ever grace the Island, it had a sickly motor that died on him through practice so he doesn't appear in the records.
The date would be circa 1960/1, a few of the riders only came to the TT those years, Angel, Brambilla,