Banknotes, German East Africa, Deutsch-Ostafrikanische Bank, one rupie, 1 February 1916 (4), Serie A4, three with one handwritten serial number, the last with X and double value stamp on back (Ros.928ac/ad; Pick 21), two very fine to good very fine, the others extremely fine to good extremely fine (4) (120 - 150 GBP)