I cannot believe someone is asking $100+ for a bit of paper supplied freely by AC's years ago. I have the same old print, same drawing date in 1956, with the prices, slightly different, eg the bonnet is £8-10-0, handwritten on the panels in the same way. Yes its ammonia printer i think, and fades rapidly in daylight! I was sent it by AC's probably early 70's, as I bought the Ace in 69. The size is 74 x 48cm approx, not sure if thats A1. Its in an old file but not sure why ayone would want it? Nostalgia?!
If that drawing gets people excited then what about several camshaft ones, rear spring etc etc all on the same medium and size. The cam ones are dated 1945, 1959, 1960. Cam profile dated 1960. There are about 7 of these in total.