Hong KongPostal History1936 (29 May.) Arnaiz-Calvo special flight envelope from Philippines to Hong Kong (9.7) redirected to Madrid (11.7) bearing Philippines 8c. (2) cancelled by "Manila/P.I." c.d.s. and Hong Kong K.G.V. 25c. cancelled by "Hong-Kong/Air Mail" c.d.s.(9.7) and "Victoria/Hong Kong" c.d.s. (29.5) on reverse, showing "Pioneer Filipino/Overseas Flight/1936" oval cachet and "Via Arnaiz-Calvo Flight" framed h.s., both in violet, adjacent, signed by the pilots, very fine.
