353 CSS 438 and 438a 1939-41 Chung Hwa Dr. SYS Die III, comb perf., 8c. complete 4x5 transfer block of 20 stamps. Secret mark "c" at transfer position 11/20.

353 CSS 438 and 438a 1939-41 Chung Hwa Dr. SYS Die III, comb perf., 8c. complete 4x5 transfer block of 20 stamps. Secret mark "c" at transfer position 11/20.