Proof -- 1880 2c. die proof in black on glazed card (92x60mm.), marked "Before rehardening" and dated "3 MAR 80"; also 1867 30c. and $1.30 stamp-size die proofs in black

细节
Proof -- 1880 2c. die proof in black on glazed card (92x60mm.), marked "Before rehardening" and dated "3 MAR 80"; also 1867 30c. and $1.30 stamp-size die proofs in black