Parker Advertisement, October 12, 1912, Scientific American Handsome cut away illustration shows the Lucky Curve inside pen and the air space and ink level, Parker Disappearing Clip is noted.  This ad measures 8.25 x 2.5 inches and is on the original full page measuring 15.5 x 10 7/8 inches.  Other old ads on the page include Rice's Mill White Paint, M.I.P. Key Filing
Machine, Crude Asbestos Direct from Mines (ugh, that wouldn't go over well today!), Federal Vacuum Cleaner and other small ads. Very good condition.