"Per Pony Express from San Francisco, May 11th, 1860." Manuscript sender's endorsement on cov (Image)

E. $ 7,500-10,000

Pony Express, San Francisco, Nov. 3 (1860). Two clear strikes of blue Running Pony ova (Image)

E. $ 10,000-15,000

Pony Express, The Central Overland California & Pikes Peak Express Company, St. Joseph Mo. May 19 (Image)

E. $ 7,500-10,000

Wells, Fargo & Co. Pony Express, $2.00 Red (143L1). Large margins to just touched including p (Image)

E. $ 15,000-20,000

Wells, Fargo & Co. Pony Express, $1.00 Red (143L3). Margins slightly in and repaired top righ (Image)

E. $ 10,000-15,000

Wells, Fargo & Co. Pony Express, 10c Brown (143L7). Two large margins, touched at top and bar (Image)

E. $ 5,000-7,500

Wells, Fargo & Co. Virginia City Pony Express, 25c Blue (143L8). Full to huge margins, tied b (Image)

E. $ 1,500-2,000

San Francisco City Letter Express. Two-line framed handstamp in black, 1c Blue, Ty. V (24) (Image)

E. $ 2,000-3,000

San Francisco City Letter Express. Two-line framed handstamp in greenish blue with matching s (Image)

E. $ 1,000-1,500

California City Letter Express Co., San Francisco, 10c Red, Type I (33L1). Margins touching t (Image)

E. $ 15,000-20,000

California City Letter Express Co., San Francisco, 10c Blue, Type I (33L2). Full bottom margi (Image)

E. $ 7,500-10,000

California City Letter Express Co., San Francisco, 10c Red, Type III, Without Ornaments (33L7). (Image)

E. $ 7,500-10,000

California Letter Express Co. (Hoogs & Madison), San Francisco, Black Printed Frank. With hor (Image)

E. $ 2,000-3,000

California Letter Express Co. (Hoogs & Madison), San Francisco, Black Printed Frank. Four-lin (Image)

E. $ 2,000-3,000

California Penny Post Company. Single-page printed notice from "Office of the Penny Post Co." (Image)

E. $ 200-300

Penny Post Co. San Francisco. Double-line circular handstamp clearly struck on blue folded co (Image)

E. $ 2,000-3,000

California Penny Post Co., San Francisco, 5c Blue (34L4). Usual close-cut margins to slightly (Image)

E. $ 1,000-1,500

California Penny Post Co., San Francisco, 5c Black Entire (unlisted; Frajola Type 6B). "City (Image)

E. $ 1,500-2,000

California Penny Post Co., San Francisco (unlisted; Frajola Type 6C). Interior envelope, "Pen (Image)

E. $ 1,000-1,500

California Penny Post Co., San Francisco, 5c Black on Yellow entire (34LU3 var; Frajola Type 1D). (Image)

E. $ 2,000-3,000

California Penny Post Co., San Francisco, 7c Black on 3c Red on Buff entire (34LU4a; Frajola Type (Image)

E. $ 2,000-3,000

California Penny Post Co., San Francisco, 7c Vermilion on 3c Red on Buff entire (34LU7; Frajola T (Image)

E. $ 1,500-2,000

California Penny Post Co., San Francisco, 5c Black on Buff entire (34LU9; Frajola Type 3A). P (Image)

E. $ 10,000-15,000

California Penny Post Co., San Francisco, 5c Black on Buff entire (34LU9; Frajola Type 3A). M (Image)

E. $ 2,000-3,000

California Penny Post Co., San Francisco, 7c Black on 3c Red on White entire (34LU10a; Frajola Ty (Image)

E. $ 2,000-3,000