1881 (1 Aug) Chinkiang to Shanghai. ‘On Service’ cover, bearing 1ca + 5ca Large Dragon stamps cancelled by Customs Chinkiang cds. Addressed to the Commissioner of Customs, Shanghai. Front only. This is the earliest recorded ‘on service’ cover bearing Large Dragons. No official covers bearing Large Dragons are known complete. Large Dragons, p.193
存世最早貼有大龍郵票的海關公文封，所見均係封面，未見有完整信封存世。埃德加、高達醫生舊藏；《大龍信封存世攷》193頁原件