2c Black, F. Grill (93).
Perfectly centered with wide even margins all around, intense shade and
proof-like impression, cancelled by sharp mostly complete strike of New
York City blue Negative 5-point Star within 11-Point Star in Circle
fancy cancel, with President Jackson peering out from hollow
centerEXTREMELY FINE GEM. A WONDERFUL COMBINATION OF CANCEL AND CONDITION. ONE OF THE MOST BEAUTIFUL 2-CENT BLACK JACK GRILLED STAMPS EXTANT.
With 2000 P.F. certificate (Image)
3c Red, F. Grill (94).
Original gum, lightly hinged, clear grill points, fresh and bright color,
well-centered, Extremely Fine, with 2000 P.F. certificate (Image)
3c Red, F. Grill (94).
Bright color on fresh paper, unusually wide margins, well-struck target
cancel, clear grill, Extremely Fine and remarkably beautiful, with 1992
P.S.E. certificate (Image) 
3c Rose, F. Grill, Imperforate
(94a). Single, full to huge margins at sides, part original gum, h.r.,
Very Fine, Scott Retail for pair $1,500.00
(Image) 
5c Brown, F. Grill (95).
Original gum, strong grill impression, deep shade and detailed impression,
Very Fine and choice original-gum example of the 5c F Grill, with 1989 P.F.
certificate (Image)
5c Brown, F. Grill (95).
Block of four, unused (no gum), dark shade and sharp impression, couple
stamps with small faults, appears Fine, with 1999 A.P.S. certificate, Scott
Retail as four singles (Image)
5c Brown, F. Grill, Very Thin
Paper (95 var). Well-centered, deep rich color and sharp impression,
light strike of circle of V's cancelEXTREMELY FINE AND CHOICE. A RARE WELL-CENTERED EXAMPLE OF THE 5-CENT F GRILL ON THIN PAPER.
The National Bank Note Co. undoubtedly made various attempts to improve grilling quality and efficiency through modifications in the process. Based on surviving stamps, it appears that one modification involved the use of very thin paper, which probably allowed two or more sheets to be grilled in one pass through the grilling device. The 1c (F), 2c (E and F), 3c (E and F), 5c (F), 10c (F), 12c (F) and 15c (F) are found on this very thin paper. They are scarce, particularly the 5c-15c values.
With 1999 P.S.E. and 2000 P.F. certificates (Image)
10c Green, F. Grill (96).
Deep rich color, wide margins, cork cancel, fresh and Very Fine, with 2000
P.F. certificate (Image)
12c Black, F. Grill (97).
Perfectly centered with spectacularly wide margins all around, intense
jet-black shade and proof-like impression on bright fresh paper, light
strike of cork cancel (almost appears unused), Extremely Fine Gem, a stamp
of extraordinary quality and beauty, with 1995 P.F. certificate (Image)
12c Black, F. Grill (97).
Well-centered with wide margins, sharp impression, light strike of circle
of wedges cancel, Extremely Fine Gem, a superb stamp, with 2000 P.F.
certificate (Image)