1904 (2 Oct) Registered picture postcard from FPO No. 84 to Ireland, f.w. Indian KEVII 1a + 2a, tied by FPO No. 84 type B2 cds., alongside
1904 (2 Oct) Registered picture postcard from FPO No. 84 to Ireland, f.w. Indian KEVII 1a + 2a, tied by FPO No. 84 type B2 cds., alongside with type B21 registered mark. Transit London (22 Oct). Arrived Sligo (Oct). It is the only record of FPO No. 84. Illustration fig 20, p. 103 in "Tibet Stamps and Postal History" by Steven Chazen and Danny Wong.1904.10.2 掛號圖片明信片,自軍郵84局寄愛爾蘭,貼印度愛德華七世1安娜 + 2安娜,銷軍郵84局B2型日戳,旁鈐B21型掛號章。10.22經倫敦。同月抵Sligo。此為軍郵84局之唯一存世例子。蔡盛及王劍智著《青康藏郵驛史》第103頁圖例20號原件。