Ring's Vegetable Ambrosia, 4c Black, Silk Paper, Imperforate (RS200b). Ample to huge margins including "Engraved" part imprint in bottom sheet margin, intense shade and impression, completely sound

EXTREMELY FINE GEM. ONE OF THE FINEST EXAMPLES EXTANT OF THE RARE 4-CENT RING'S VEGETABLE AMBROSIA ON SILK PAPER, AND THE ONLY EXAMPLE WE HAVE ENCOUNTERED WITH PART OF THE IMPRINT.

Only ten examples of this rarity are recorded in the Aldrich book, about half of which are reported to be sound. A review of the Philatelic Foundation records and Power Search failed to find another example with part of the imprint

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