A pair of blue and gray stoneware kitchen canisters in the Yorktowne dinnerware and kitchen accessories pattern by Pfaltzgraff, introduced in the late 1960s. They're the two largest size, commonly known as the flour and sugar. Instead of spelled out lettering, this harder to find crock version has the Pennsylvania keystone symbol on the front of each numbered canister.
The large number 4 canister is 8 inches high to the lid knob by 7-3/4" diameter across the rims. The number 3 crock is 7-3/8" high by 7 inches diameter. The bottoms are marked with the Pfaltzgraff USA castle logo and stock numbers 506Y and 507Y respectively. Both are in excellent, spotlessly clean condition with no damage, scratches, or wear. They look like they were never used.