unused 1950 "Unit" stamps of Nationlist China surcharged; perf. 12½ $300 marginal strip of three with paper fold resulting in the left two stamps showing part of surcharges omitted or printed on reverse, $300 with additional printing of basic design on reverse; perf. 14 $500, $800, and 1950 (May) unissued stamp of East China $20,000 on $10,000, fine unused. Yang cat. US$590+