tied by blue "Wells Fargo & Co. Express Mount Ophir" oval to 10c Green entire (U33) with red printed frank at top, endorsed "Per Pony Express" and addressed to Colchester, Vermont, entered the mails with "Atchison Kan Oct 19" double circle datestamp, opened roughly at right and small tear at top, otherwise very fine, the only Pony Express cover originating at Mount Ophir and the only one to Vermont, this cover was collected by the Pony Express on its October 5 trip, 2023 Philatelic Foundation certificate (FKW Census #E175)