Lancaster, PA's Standard Caramel Company produced this 30-player set in 1910. While its issue date coincides with the seminal (and massive) T206 cigarette set, tobacco and candy makers soon moved in different directions. Baseballers vanished almost entirely from cigarette packs by 1920, as their corporate magnates colluded to lower production costs by dropping sports cards and other high-cost promotions. Candy companies quickly filled the market with low-cost alternatives, capitalizing on America's growing sweet tooth and the rising economic power of children.
Each Standard Caramel card uses the same back, a checklist of all 30 players. They're numbered almost in alphabetical order--notice how the "C" players munge together, with Chance coming between Collins and "Coveleskie" (actually HOFer Stan Coveleski).
Value: Not many E93s survived to the present day, so even low grades prove expensive. This poor/fair HOFer cost about $200 on eBay.
Fakes / reprints: Folks have both "officially" reprinted this set and faked individual players. Genuine card stock closely matches T206s and other tobaccos, but has a much glossier front.
UPDATE: Here are "clean" versions of the front and back. (Pretty sure they're scanned from a reprint set, with whiter card stock.)