cover 10c Green type V (35), horizontal pair, natural s.e. at L. showing part of frame line, used with 1c Blue (24) and tied by black grids on 1861 folded letter to Hong Kong, China, addressed to Augustine, Heard & Co., New York Am Pkt transit marking, London and Hong Kong backstamps, light horizontal file fold, a fine-very fine cover illustrating the British Mails special 21c open mails ratephoto est.

Details
cover 10c Green type V (35), horizontal pair, natural s.e. at L. showing part of frame line, used with 1c Blue (24) and tied by black grids on 1861 folded letter to Hong Kong, China, addressed to Augustine, Heard & Co., New York Am Pkt transit marking, London and Hong Kong backstamps, light horizontal file fold, a fine-very fine cover illustrating the British Mails special 21c open mails ratephoto est.