49H Oil Derricks. The set in the rear is the standard Frankoma ivory. The set is the front is the very rare glaze 1942 semi-matte white. This is from the period when John Frank was experimenting with replacing the old ivory glaze that tended to craze. The eventual winning glaze was white sand. The result for shaker collectors is that a standard glaze, white sand, is rare on early-post fire sets.