Fender brace observations from my 1921+/- Racycle: When I purchased the bike it was missing part of the the rear fender brace. With comparative research I found this type of brace (double rivets just below the fender) appears on a handful of other late teens/early 20's Racycles. Fortunately I was able to locate a replacement. Just before I mounted the brace I could make out an imprint that would be hidden after attachment to the fender. It reads "Wald Mfr. Made in USA, Patented." It seems Wald's proprietary idea with these braces is the two small side tabs that aid in securing a square nut in place.