6N5a, CSS ST9, North China, Shantung: 1941 overprint, small type I, on Second London printing Dr. Sun Yat-sen 25c., wide type, Ex Lee J. Hill

6N5a, CSS ST9, North China, Shantung: 1941 overprint, small type I, on Second London printing Dr. Sun Yat-sen 25c., wide type, Ex Lee J. Hill