Stamp Finder ↺ Scott or Y & T ? Chiffres Taxe 1906-1920 Postage Due Stamps Sc J10 / YT TT10 Sc J11 / YT TT11 Sc J12 / YT TT12 Sc J13 / YT TT13 ‘Gl. O. Z.’ Overprint 1914 Sc J17 / YT TT17 Sc J18 / YT TT18 Sc J19 / YT TT19 Sc J20 / YT TT20 ‘POSTE 5 CTS GOURDE’ Surcharge 1919-1920 Sc 305 / YT 244 ‘POSTE 5 CTS GOURDE’ Surcharge on ‘Gl. O. Z.’ Overprint 1919-1920 Sc 306 / YT 245 Sc 307 / YT 246 Sc 308 / YT 246a