Lot
541 
Mexico, 1914, 20c Victoria de Torreon, well centered for this issue, tied by neat "Ciudad Juarez, 4 Abr 14" duplex postmark on cover to El Paso, Texas, Very Fine, a great on cover rarity, with only 100 stamps issued, this may be the only cover known with a solo usage; with 1993 M.E.P.S.I. certificate. Scott No. 367; $2,500 for off cover Estimate $3,000 - 4,000.
Realized: $2,800