China: 1941 (5.11.) airmail cover Shanghai to Sweden franked 40c (2), $1 and pair $5 from three different issues tied bilingual Shanghai date stamps, envelope endorsed “Pan-American/ AirMail over the/ Atlantic & Pacific Ocean”, censored en route and showing a fine example of violet two-ring AIR-TRANSIT/ 4 handstamp. Fine and scarce, the no. 4 being one of the rarer numbers.
