Lot
2425 
Mexico, 1914, 20c Sonora Coach Seal, Guaymas "E C" provisional overprint, two singles, tied on bank cover to Nogales, Sonora carried through the U.S. with stamps canceled by San Francisco, Cal., Nov 7, 1915 duplex postmark, rough top margins and one stamp faulty, Fine, a very rare and interesting usage. Follansbee No. Guaymas 4. Scott No. 398 var. Estimate $200 - 300.