This set's uniqueness stems from the combination of horizontal and vertical images that make it somewhat difficult to view this set in a card binder without rotating the thing around every few cards. Topps never again produced a card set in horizontal format during this modern card size era (1957-present). The 1955 and 1956 Topps sets also used horizontal images, but the larger card size requires special 8-pocket pages, which makes viewing horizontal cards simple. Nevertheless, this is an outstanding card set in my opinion, that is every bit as colorful as the '59, '63, '72, '75, and '81 sets--if not more.
One of the interesting aspects of this set, I think, is the inclusion of a coaches card to go along with the team checklist and manager cards. The manager and his coaches are an important part of every team, but aren't included in recent card sets anymore. In fact, coaches cards are rare in any card set--especially as a separate card like it is in the '60T set.
Other distinctive card issues included in the '60T set are Sport Magazine Rookie Stars, Topps All-Star Rookies (not shown), Sport Magazine All-Stars (not shown), player combo cards (not shown), and world series/playoff cards (not shown).
Although the Kansas City Athletics had the worst record in the major in 1960, I chose to start with this team because of their surprising recent World Series appearance in 2014. The K.C. Athletics cards shown are all I currently have available from this set right now.
The card backs show a combination of either gray or white cardstock, which I cannot explain. It's not something I really pay attention to when collecting cards from this set. Perhaps someone will have some further insight into the usage of the two different types of cardstock here. I've noticed it in other vintage sets as well.