WF 59v1, 5c Blue Numeral envelope, 15c Frank, Stamp inverted in normal position, 1891 used entire from Guaymas to San Fransisco, California, magenta "Express Wells, Fargo y Cia, Guaymas, Mexo. Ago 22 1891" oval handstamp and matching August 26 San Francisco arrival handstamp, small tears along top edge, very fine and rare, this error is not priced in the UPSS catalogue (UPSS $100 for mint)