And the search goes on for Dads 61 R69S. Thanks to yesterdays events I have a lead.

Small world. I'm 99% sure I just found one of my Dads motorcycles.

http://weissundblau.blogspot.com/2012/12/r5175-racebike.html

Dropped this gentleman a Email a second ago.
Pictures I have the bike from the early 60's.