This set was sold in 1998 at the Disneyland Resort. The set was entitled "The Atomic Age: Tomorrowland 1955-1961". The entire set consisted of 10 pins, which inludes the large oversize main pin (Pinpics #12840), a title pin, and 8 pins that were also part of the 1998 attraction series, Flying Saucers, Spaceman K-7, Skyway, Phantom Boats, Viewliner, Autopia, Submarine Voyage, and Astrojets. The difference is that all the pins in this set are individually numbered XXX/750. The regular edition size was 750 sets, but there were also 75 Artist's Proof Sets, making the total 825. Artist Proof sets can be denoted by no number preceding the /750. The set is quite large and professionally framed, measuring 18" wide by 33" tall. There are also 15 "printer's proof" sets; see pin #36898.