Mexico, Envelope, 1892, 10c Vermilion, Advertising Sheet and Envelope, addressed to Matehuala and canceled by 1893 Mexico D.F. cds, these were printed as a special order containing a printed flyer with many advertisements and an embossed image of the 10c, the envelope has a cut oval. The user would only pay 5c and the remaining 5c would be subsidized by the advertisers; opening tear at top, F.-V.F., a rare postally example of this unusual advertising entire, approximately 10-15 exist used. Estimate  $250 - 350. $0 (Image)