1c Blue, Ty. I (18).
Position 68R12, choice centering for this difficult stamp, pretty pastel
shade nicely contrasted by red carrier cancel, Extremely Fine, with
1981 P.F. certificate (Image)
1c Blue, Ty. I/II (18, 20).
Block of four, top stamps Type I, bottom stamps Type II, original gum,
top stamps (Type I) Mint N.H., bottom stamps barely hinged, fresh
and bright colorVERY FINE-EXTREMELY FINE. A BEAUTIFUL AND RARE COMBINATION BLOCK OF THE PERFORATED ONE-CENT TYPES I AND II. ESPCIALLY DESIRABLE WITH TWO MINT NEVER-HINGED TYPE I STAMPS.
With 1987 P.F. certificate stating "previously hinged at bottom", Scott Retail without Mint N.H. premium (Image)
1c Blue, Ty. Ic (19b).
Position 91R4, wide-spaced perforations at top and bottom, centered
slightly to top right but clearly showing the characteristics of the type,
deep shade on bright paper, neat blue town datestampVERY FINE AND CHOICE. PROBABLY THE WIDEST-MARGINED EXAMPLE OF THE RARE TYPE Ic, WHICH IS THE SCARCEST TYPE OF THE PERFORATED ONE-CENT STAMP. NEINKEN NOTES THAT THIS POSITION -- 91R4 -- YIELDS THE BEST EXAMPLE OF TYPE Ic.
The defining characteristic of Type Ic is similar to that of Type Ia, Scott 19, which has the design complete at bottom and partly complete at top. The difference between the more "common" Scott 19 and 19b is that the bottom right plume on the Type Ic is incomplete. Neinken classifies it as a sub-type of Scott 19, and the Scott Catalogue gives it a separate listing. Neinken notes that only eight or nine positions yield this type. Of these, only two are found on the bottom row of the plate (Positions 91R4 and 96R4). The other six or seven Type Ic positions were created either by plate burnishing prior to use or plate wear during use.
Wide-spaced perforated stamps are extremely rare and highly desirable. It has been assumed for years that the pins of the bottom row of the perforator were reset to create more space, but some students of the 1851-57 Issue are seeking alternative explanations for its occurrence. Whatever the cause, they are considered extremely rare.
With 1986 P.F. certificate (Image)
1c Blue, Ty. II (20). Plate
11, original gum, lightly hinged, fresh color, Very Fine and choice, with
1975 P.F. certificate (Image)
1c Blue, Ty. III (21).
Position 26R4, intense color and proof-like impression, beautifully
centered with wide and well-balanced margins, faint pen cancel leaves
design clearly visible, Extremely Fine, with 1983 P.F. certificate (Image)
1c Blue, Ty. III-IIIa
(21-22). Positions 62-63R4, horizontal pair, left stamp Type III, right
stamp Type IIIa, rich color on bright paper, near-perfect centering, neat
grid cancelsAN EXTREMELY FINE COMBINATION PAIR OF THE 1857 PERFORATED ONE-CENT TYPES III AND IIIa. EXCEEDINGLY RARE IN SUCH PERFECT CONDITION.
Although Plate 4 was designed with the introduction of perforations in mind, it was still difficult to apply the perforations without impinging on the designs. An examination of Plate 4 stamps reveals that many have perforations either touching or cutting into the design. This Plate 4 Type III-IIIa pair, with near-perfect centering that clearly displays the characteristics of the types, should be considered a condition rarity.
With 1980 P.F. certificate (Image)
1c Blue, Ty. IIIa (22).
Plate 11, unused (no gum), near-perfect centering with well-proportioned
margins, bright shade, fresh and Extremely Fine, with 1991 P.F. certificate
(Image)
1c Blue, Ty. IIIa (22).
Deep rich Plate 4 color, choice centering, neat strike of large Boston
"Paid" grid and trace of red transit cancel at bottom, Extremely Fine Gem,
with 1980 P.F. certificate (Image) 
1c Blue, Ty. V (24).
Original gum, barely hinged, wide margins, rich color, Extremely Fine, with
1986 P.F. certificate (Image)