2c Black, E. Grill (87). Rosette cancel which ties stamp (thru perfs at bottom) on large overall illustrated Guffroy's Cod Liver Extract advertising cover depicting eagles, shields, flags and a large cod, addressed to Halowell Maine, George H. Felt 1868 imprint on flap, original enclosure which is also illustrated and gives a long treatise on the health benefits of cod liver oil, trivial toning around stamp edges from gum, short perfs at left, Very Fine, a remarkable design and very desirable with the Black Jack, ex Faust

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