Mexico, 1856, 2r yellow green, without overprint, San Felipe del Obraje. Neat San Felipe straight line cancel, full well balanced margins, strong color, Extremely Fine, direct shipment of only 190 stamps with approximately 3-4 in existence, quite possibly the finest single extant (NF$1,200). Scott No. 3d  Estimate $1,500 - 2,000. $0 (Image)