China. (Diplomatic Bag Mail - Ireland). 1885. Envelope written from Ireland addressed to 'Sir N.R. O' Conner, British Legation Peking, c/o Foreign Office, London' bearing Great Britain SG 172, 1d lilac tied by Ballinasloe duplex, sent via the Foreign Office, London and forwarded in Ambassadorial Mail Bag.
The 'one penny' rate indicates the item to show payment for the internal rate of postage in the country of origin only.
A scarce item illustrated in 'Imperial China' by Major Dickie Pratt' page 266.