He was at the forefront of racing specials in england in the sixties , especially tritons, he won the barcelona 24 hours race several times on his triton beating factory teams. He reckons to have built well over a thousand tritons in his life time.
Google dresda autos.
I was in London in '76 after the IOM TT and went to check out Dave Degens Dresda Autos, walked in, nobody there. Said hello, looked in the back, nobody. Looked around for a while, stood out front, never saw anybody there, doors wide open! I was there about 1/2 hour.
I did have a Dresa box section swingarm on my NorBSA. Good quality stuff, brazed Reynolds 531, tapered rollers. That came years later by mail order (before online ordering, we had to phone far away and send letters that took a long time, then wait a long time for parts to arrive).