細節
unused CHANG CHUN: Four-character overprint, a collection of varieties with 5f. overprint double and misplaced overprint, 30f. overprint misplaced vertically (10) and diagonally (12), 50f. Kuo for Hwa and misplaced (3), 1y. overprint double (3), inverted (8) and misplaced (13); several blocks of four, good to fine mint. Kerr 13. (61)