1917 Cover from Tanga to Amani with I.E.F 1/2a pair tied F.P.O 304 c.d.s, backstamped blue-green "MAIL AGENCY / No. 1" arrival c.d.s (May 8, year date inverted). The only example recorded by Proud, very scarce. Photo on Page 190. (Image1)

1917 Piece from a parcel bearing a complete address label to Amani with I.E.F 1/2a tied Indian F.P.O 304 c.d.s and blue "MAIL AGENCY / No. 1" arrival c.d.s (May 23), a little doubled but still very clear and rare. Proud only recorded a single example of this Mail Agency c.d.s, also used in May 1917 at Amani. Vertical fold, otherwise fine. Photo on Page 190. (Image1)

1917 (9 Aug) Stampless O.A.S cover to India with Daressalaam censor cachet, backstamped "MAIL AGENCY / No 3" c.d.s and an arrival c.d.s. The earliest recorded date of use of this c.d.s which is only recorded in August 1917, the place of use unknown. Very scarce. Photo on Page 194. (Image1)