(Overland Pony Express) Wells Fargo & Co., 1861 $4 green, Pony Express Adhesive. blue San Francisco "Running Pony" oval handstamp, four full margins, small filled thin, Extremely Fine appearance, with 2005 P.F. certificate. Scott No. 143L2  $1,250. Fewer than six used examples of the $4.00 green horse & rider first issue have been reported. Possibly the finest used copy extant. The $4.00 Green was used briefly during Rate Period 3 to pay the double $2.00 per half-ounce rate. Only one cover is recorded. $0 (Image)

(Overland Pony Express) Wells Fargo & Co., 1861 $4 black, Pony Express Adhesive. Lovely 4-margin example, trivial corner crease, Very Fine appearance. Scott No. 143L5  $175. $0 (Image)

(Overland Pony Express) Wells Fargo & Co., 1861 $4 black, Pony Express Adhesive. Blue "Wells, Fargo & Co." oval cancel, four clear to to mostly large margins, bright fresh color, thin spot & small tear at bottom, Very Fine appearance; with 1999 P.F. certificate. Scott No. 143L5  $6,000. A very rare used Pony stamp, no used example were present in the recent Twigg-Smith sale, except for the famous $4 black used from Hawaii. $0 (Image)

(Overland Pony Express) Wells Fargo & Co., 1861 $4 black, Pony Express Adhesive. Position 9, full margins all around, cancelled by blue San Francisco "Running Pony" oval datestamp, tiny negligible surface scrape at top right, Very Fine and choice, ex-Caspary; with 2005 P.F. certificate. Scott No. 143L5  $6,000. One of the few $4 Black Pony Stamps with the Running Pony handstamp. One of five recorded used examples of the $4.00 black Pony Express stamp. $0 (Image)