CHINA - French P.O. 1928 registered letter posted to Karaikudi-India from Saigon, franked with French issue for CANTON 2x20c/50c in combination with Indochina 5c all applied at the back of envelope and cancelled by SAIGON c.d.s. Alongside transit and arrival postmark. Front shows routing endorsement " Via Colombo or Singapore" Unsual usage of French offices for China-Canton stamps at Cochin China. Ex Desrousseaux. (Photo). Est. 100 - 200 CHF.