1948-49, an unused and used collection with numerous varieties, perforation and printing types including 1948-49 surcharges on Sun Yat-sen issues to $200,000 on $50,000, 1948 (Nov.) Chi Yang unauthorised surcharge pair, 1949 on Revenue stamps, various printings with Hankow surcharge $500,000 on $20 (Type A) unused; and a selection of temporary chops (5) prior to the introduction of the Unit Stamps. (hundreds)