1917 envelope endorsed ‘On Active Service’ to Johannesburg cancelled by a fine strike of the squared circle NYASALAND FF ‘5’ MY 6 17. The cover was written by Sgt. Babcock, 2nd S.A.R. G.EA. It has been countersigned by a Lieutenant in the 2nd S. A. R. at the top. This cancel was at SONGEA at that time. A rare and seldom seen cancellation.