VERY FINE APPEARING UNUSED EXAMPLE OF THE 1868 3-CENT Z GRILL.
The 3c Z Grill was in production for only a short period of time before the device was replaced with the F Grill. Only a small number of 3c sheets were fed thru the Z Grill, which accounts for the rarity of surviving examples, especially in unused condition.
With 1972 and 2018 P.F. certificates
EXTREMELY FINE ORIGINAL-GUM EXAMPLE OF THE 1868 ONE-CENT F GRILL, SCOTT 92.
With 1979 P.F. certificate