Lot
535 
Mexico, 1913, Sonora, 5c black & red, type a, half sheet of five, upper portion of sheet canceled and tied by "Pola. Estn. Son, 14 Jul 13" duplex postmarks on cover to Estacion Carbo, with receiving postmark at right, Very Fine, very scarce (NF $750 for a half-sheet). Scott No. 326 Estimate $400 - 600.
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Realized: $375