CSS HN6, North China, Honan: 1941 overprint, small type I, on Second London printing Dr. Sun Yat-sen 4c., narrow type B, most of the issued quantity was used postally

CSS HN6, North China, Honan: 1941 overprint, small type I, on Second London printing Dr. Sun Yat-sen 4c., narrow type B, most of the issued quantity was used postally