12c Black, F. Grill (97).
Choice centering, crisp impression, neat circle of wedges cancel, Extremely
Fine, with 2004 P.F. certificate (Image)
12c Black, F. Grill (97).
Well-centered on bright white paper, light cancel, Extremely Fine, with
copy of 2002 P.F. certificate (Image)
15c Black, F. Grill (98).
Original gum, lightly hinged, clear grill, rich color and sharp proof-like
impression, small closed tear at left, Extremely Fine appearance, with 1995
and 2004 P.F. certificates (the first not noting the tear) (Image) 
24c Gray Lilac, F. Grill
(99). Original gum, lightly hinged, clearly-defined grill, rich color
and detailed impressionVERY FINE AND CHOICE. A REMARKABLY FRESH ORIGINAL-GUM EXAMPLE OF THE 1868 24-CENT F GRILL.
The higher-denomination F Grills were produced in limited quantities and so this is one of the most difficult of the grilled issues to find in sound condition with Very Fine centering.
With 2000 P.F. certificate (Image)
24c Gray Lilac, F. Grill
(99). Original gum, clear grill, centered to top left, Very Good,
scarce in original-gum condition (Image)
24c Gray Lilac, F. Grill
(99). Rich color, bold cork cancel, small faults, otherwise Very Fine,
choice centering for this issue (Image)
24c Gray Lilac, F. Grill
(99). Choice centering, bold red Baltimore Dot in Circle Foreign
Mail cancel, small tear and repaired perf, otherwise Extremely Fine,
with 2001 P.S.E. certificate (Image)
30c Orange, F. Grill
(100). Radiant color, clearly visible grill, neat target cancel, Very
Fine and choice, with 1998 A.P.S. certificate
(Image)
30c Orange, F. Grill
(100). Perfectly centered with unusually deep color, neat target
cancel, light creases, Extremely Fine appearance
(Image)
30c Orange, F. Grill, Split
Grill (100 var). Horizontally split grill, bright color, bold
Philadelphia fancy cork cancel, small corner creases at top corners, Fine
appearance (Image)
90c Blue, F. Grill (101).
Rich color, clearly-defined grill, neat circle of wedges cancel, small
corner crease, otherwise Very Fine, with copies of 1982 (not noting corner
crease) and 2002 P.F. certificates (Image)