Twenty Five or more years ago I found a great stash of original pre-1920 motorcycle literature in New condition. I sold some of the pieces over the years but held on to a few that were really cool. This is a 1909-1910-1911 Flying Merkel parts book. It is 36 pages of every part for singles and twins. It has incredible detailed pictures and exploded views. Above is an example of what is inside. I'm afraid of scanning too much and damaging it so I just did the center page that could open up enough to lay on the scanner.
Shit... I guess this thing is 100 years old now!
I also have a "New" 1918 Harley Accessory Catalog with the original envelop it was mailed in. I will post some images of that as well.