Russia Empire: 1915 (14 March). Registered cover to India franked with 1k perf. 13 1/2, 4k perf. 12 1/2, 8k and 11k perf. 11 1/2 war charity stamps tied by Riga datestamps. Reverse 26 April Hong Kong, 15 May Tuticorin transit and 18 May Calcutta arrival cds’s.
