49H Oil Derricks, onyx black glaze, 3/3 hole set. This Type 2 set is embossed "Casper" on one side and "1952" on the opposite side. I think these were originally distributed with one marked shaker and one unmarked shaker. I cannot pin down the Casper reference. Wyoming is the only state with a Casper (that I can find) and 1952 was an important date in politics. Many of the delegates to the national Democratic convention in 1952 were from Casper, WY.