Page 91 - Chinese International Airmail to 1949
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3.2.6 Rate UOR 6: 1 Apr 1948 to 10 Apr 1948 (10 days). Surface first 20g $25,000 Air per 10g $65,000 5 Apr 1948 ‑ Shanghai to New Malden, England. No backstamps. Single rate letter $25,000 + $65,000 = $90,000.
