Page 23 - Chinese International Airmail to 1949

1.3.1 China to Singapore, KLM to Amsterdam, then onward to London

First Rate to UK: Aug 1933 to 18 Mar 1935.
Surface first 20g $0.25 Surface extra 20g $0.15 Air per 5g $0.47 Registration fee $0.25

28 Sep 1933 ‑ Nanking to Seaford, England. Early example of KLM service to the UK.
Single rate registered letter $0.25 + $0.47 + $0.25 = $0.97.

Reverse of cover: Additional adhesives and handstamps: Shanghai (29 Sep), Singapore (9 Oct) and Seaford (20 Oct) (75%).