Deutsch-Ostafrika - Briefe 1916
Katalog Stanley Gibbons (SG) 35M35
MAFIA ISLAND OVERPRINT ON 1915-16 1a Aniline carmine overprinted "I.E.F." and further handstamped "G.R/Post/Mafia" in dull blue, single affixed to back of cover to Zanzibar, with mostly clear "Zanzibar/Ju 20, 16" arrival datestamp alongside, portion of cover missing at upper right, otherwise a fine and EXTREMELY RARE commercial usage; the adhesive is not "tied" to the cover, which is customary since the overprint was applied as a combined overprint and postmark; SG M35, 2010 RPS certificate.
Deutsche Kolonien: Deutsch-Ostafrika, britische Besetzung Mafia 1915-1917, extrem seltener Bedarfs-Brief.