French AR 1 Franc (1898-1920) 23.3mm.  Marianne left sowing seed. R. Engraved SOUVENIR OF THE GREAT WAR on garter around; 1914 1915-1916  1917 - 1918 WAR FINISHED in ribband in centre. Skillfully done.  Obverse has a rainbow of irdescent (natural) toning from dark blue to red.