Sure enough, I stand corrected. Dang, now I've got to track down another part for my Jaguar project. Shows up with that same seat in the 1955 catalog as well, not sure why I thought it came with the full crash bar seat. Oh, well.
Cheers, Geoff
Another oddity in the literature. The 1953 Advance lists Royal Rider Whitewall or Blackwall tires and the 1955 Catalog shows Schwinn Monsoon Cords.
I have the original Royal Rider tires for this bike but they're beat. Can't ride them but I'll probably install them for display.