U.S.P.O., Philadelphia Pa.,
1c Gold on Black Glazed (7LB11). Full margins, usual faint wrinkles,
tied by two strikes of blue "Philada. Pa. 10 May 5" integral-rate circular
datestamp on small neat cover to Cincinnati, Extremely Fine, one of the
rarest tied usages among the carrier issues, ex Seybold, Knapp, Meyersburg,
with 1997 P.F. certificate (Image) 
U.S.P.O., Philadelphia Pa.,
1c Blue (7LB12). Ample to huge margins with trace of adjoining stamp at
right, faint pre-use crease, tied by red star cancel on Dec. 1852
blue folded letter to local street address, couple file folds clear of
stamp, Very Fine, ex Meyersburg, with 1997 P.F. certificate (Image) 
U.S.P.O. Philadelphia Pa., 1c
Blue (7LB12). Large margins to touched at top, bold red star
cancel (not tied), used on folded cover to local street address, some
bleed-thru from writing inside, Very Fine, scarce carrier usage, with 1990
P.F. certificate (Image)
U.S.P.O., Philadelphia Pa.,
1c Blue on Buff (7LB14). Pencil layout line at bottom, unusually clear
impression, two full margins, slightly in at top and left, slight bend at
lower right corner and faint thinningA FINE-APPEARING EXAMPLE OF THIS EXCEEDINGLY RARE CARRIER STAMP. NO MORE THAN A DOZEN EXAMPLES OF 7LB14 ARE KNOWN TO US.
The Type C31 stamps were ordinarily left uncancelled, this probably was removed from a cover. The pencil line at bottom is a characteristic layout line.
Ex Schwartz (Image)
U.S.P.O., Philadelphia Pa.,
1c Black (7LB16). Diamond-shaped margins slightly into oval at lower
left, negligible crease noted on certificate, used with 1c Blue, Ty. IV
(9), ample margins, both stamps tied by "Philadelphia Pa. Jun. 18" (ca.
1856) circular datestamp on small mourning cover to New York, from which
two 1c stamps in the original strip of three have been cut out (along with
cover), folded to be displayed as a pieceA FINE EXAMPLE OF THE U.S.P.O. EAGLE CARRIER ADHESIVE STAMP, OF WHICH FIVE ARE RECORDED.
The Philadelphia carrier stamps printed on the sheet selvage of imperforate 1c 1851 stamps hold a unique position in United States philately. Elsewhere in the world there are very few instances in which sheet selvage was used to produce adhesive stamps -- the Emory Va. Confederate provisional and early stamps of Zanzibar come to mind as other examples.
Based on genuine dated examples of Scott 7LB16 and 7LB18, as well as the record of Eagle Carrier covers used in Philadelphia, it appears that the supply of Eagle Carrier stamps in Philadelphia was depleted sometime in 1856 and that the carrier department resorted to substitute means of supplying stamps for prepayment of the carrier fee. One step was to obtain and distribute 1c 1851 stamps, which required a special accounting arrangement with the post office. Another was the creation of the handstamped adhesives, Scott 7LB16 and 7LB18.
Two handstamps were used to create Philadelphia carrier stamps in 1856: the Eagle oval (Scott type C31), which produced 7LB16, and the large oval (type C32), from which 7LB18 was made. Both are rare, but 7LB16 is considerably rarer, with only five examples recorded: 1) rectangular margins, on cover with 3c 1851 removed, ex Hessel, Golden (realized $6,250), 2) rectangular margins, used on cover with strip of three 1c 1851, ex Caspary, 3) diamond-shaped margins, on piece with one 1c 1851 intact, ex Caspary, Boker, Golden, D.K. Collection, the example offered here, 4) rectangular margins showing part of imprint, used on cover to San Francisco with 10c 1855, Siegel 1993 Rarities sale, lot 338, and 5) irregular but mostly rectangular margins, grid cancel, Siegel Dec. 12-14, 1995 (Sale 771, lot 1151). Only one of the five recorded stamps is found on an intact cover.
Ex Caspary, Boker, Golden and D.K. Collection. With 2000 P.F. certificate. Scott Retail for off-cover stamp is $5,000.00. (Image)
U.S.P.O., Philadelphia Pa.,
1c Black (7LB18). Mostly clear impression struck on corner sheet
margin of 1c Blue, Type II (7) from Position 10R2, part of design and
plate wash are clearly visible, scissors-cut, uncancelled on piece, small
tears at top and bottom (one from scissors)VERY FINE APPEARANCE. THE ONLY EXAMPLE OF THIS RARE CARRIER STAMP WE HAVE SEEN IMPRESSED ON THE CORNER OF THE SHEET. THE ULTIMATE "CORNER COPY".
The Philadelphia carrier stamps printed on the sheet selvage of imperforate 1c 1851 stamps hold a unique position in United States philately. Elsewhere in the world there are very few instances in which sheet selvage was used to produce adhesive stamps -- the Emory Va. Confederate provisional and early stamps of Zanzibar come to mind as other examples. Two handstamps were used to create the Philadelphia carrier stamps: the Eagle oval (Scott type C31), which produced 7LB16, and the large oval (type C32), from which 7LB18 was made. This is the only example of either type we have seen from a corner sheet-margin position.
Ex Knapp and Hall. With 2001 P.F. certificate. (Image)
U.S.P.O., Philadelphia Pa.,
1c Black (7LB18). Beautiful clear impression of handstamp on selvage
with "Phila, New York, Boston and Cinc" portion of imprint,
uncancelled and affixed to 1852 folded letter, in our opinion the stamp was
issued in 1856 and could not originate on this letterEXTREMELY FINE EXAMPLE OF THE PHILADELPHIA U.S.P.O. DESPATCH CARRIER STAMP ON THE IMPRINT SHEET MARGIN OF THE ONE-CENT 1851 ISSUE.
Ex Caspary. Scott Retail as used off-cover stamp $2,000.00 (Image)
U.S. Penny Post, St. Louis
Mo., 2c Black (8LB1). Type I, unused (no gum), three large margins with
outer framelines complete on three sides and part of adjoining stamp's
frameline at bottom, clear of outer frameline at right, intense shade and
impression, tiny toned spotVERY FINE. ONE OF THE THREE FINEST OF THE FOURTEEN RECORDED EXAMPLES OF THE ST. LOUIS 2-CENT BLACK CARRIER STAMP.
Our census of the St. Louis 8LB1 carrier stamp contains 11 unused and 3 used stamps (none is known on cover). Only 5 of the 14 stamps are Type I. A completely sound example realized $6,000 in our Golden sale. This stamp, with a tiny toned spot, is one of the three finest of all known examples.
Ex Col. Green and Hall. "W.H.C." (Colson) backstamp. With 2001 P.F. certificate (Image)
U.S. Penny Post, St. Louis
Mo., 2c Black (8LB2). Type II, unused (no gum), large margins clear of
outer framelines on three sides and just touching extreme outer line at
left, intense shade and impressionEXTREMELY FINE. ONE OF THE TWO FINEST SOUND EXAMPLES OF THE FOURTEEN RECORDED ST. LOUIS CARRIER STAMPS.
Only 6 of the 14 recorded 8LB1 or 8LB2 stamps are sound. Two are Type I (8LB1) and four are Type II (8LB2).
Ex Redfield, Golden and D.K. Collection.
With 1972 Friedl certificate signed by Bloch and Boker, and with 1999 P.F. certificate. (Image)
St. Louis "1 ct" in
Frame. Clearly struck handstamp on brown cover to local street address,
Very Fine, scarce (Image) 
Pittsburgh Pa. Folded
cover to "Agent of the Cincinnati & Pittsburgh line of steamboats -- or
to the Capt. of the St. Boat Harriet" with instructions "The Penny
Post will please deliver this forthwith", blue "Maysville Ky. Aug. 8"
circular datestamp and matching "Paid" and "5" in circle, ca. 1850, Very
Fine (Image)