Cover Balance. 14 covers and cards; better usages including 4-margin #15 from San Francisco, 2¢ Blackjack on cameo corner card cover, #23 on cover (cat $1,150), #64 with APS cert (nibbed perfs), #31 on cover from S.F. (cat $1,550), 1920's usages from U.S.P.O. in Shanghai, China, railroad covers, #78 on domestic oversized cover with multicolored Flag of Columbia, etc.; condition mixed, worth inspection. Estimate  $400 - 600. $0