Tanganyika: Mafia Island: 1915 (Sept.) Type 4 “G. R/POST/MAFIA” handstamp in bluish green on 3p. to 1r. set of ten, mint, the 1r. is creased, 8a. has pulled corner perf., others mainly fine. S.G. M33-42, cat. £2,500. B.P.A. certificate for set (2007). Photo. (Image1)