China. (Boxer Rebellion). 1901. Stamp-less envelope endorsed 'Troupes de l' Indo-Chine' addressed to France cancelled by 'Bac-Kan s/ Song Cau/ Tonkin' double ring '23rd Jan 01' with undated 'Corps Expedit/Tonkin' and 'Commandant D' Armees/ Tonkin/ Post de Bac-Kan' in green on face, signed by the Commander, routed via Cho-Moi and Thainguyen '25/1' with Hanoi transit and Sevres arrival on reverse in France '13 Mars'. Superb.
Ex John Marc Sitarek.