1918 ½ Anna postal stationery envelope overprinted C. E. F. to Tientsin, cancelled F. P. O. 6, 14 AU 18. This F.P.O. was at Shanhaikwan and a 14 AUG 18 datestamp from Shanhaikwan is on the front of the cover. On the back is a Base Office 'B' 18 AU 18 arrival cancel. One of the less common F.P.O.'s.