700A, CSS 1077A, 1946 Chungking Central Trust $20 on 5c green, surcharge error ($20 instead of $50) signed three times on reverse. CSS 2010 Certificate (2 images)

700A, CSS 1077A, 1946 Chungking Central Trust $20 on 5c green, surcharge error ($20 instead of $50) signed three times on reverse. CSS 2010 Certificate (2 images)