Antigua 1953 QEII 1c Printer's Black Stamp Design on Clear Plastic Piece

Queen Elizabeth II 1c stamp design printed in black on clear plastic piece. Am unsure what this really is or its status.
Year : 1953
Reign : Queen Elizabeth II
Catalogue No : SG 121P
Condition : Unused
Price : highest bid - sold on 10/02/2025
Antigua 1953 QEII 1c Printer's Black Stamp Design on Clear Plastic PieceAntigua 1953 QEII 1c Printer's Black Stamp Design on Clear Plastic Piece

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