Bidspirit auction | Portuguese India 1875 dual franking

Portuguese India 1875 dual franking cover from Panjim (Nova-Goa) to Damao via Bombay. Franked with a British India half anna blue and a 20 reis vermilion Native issue (CE 25). Light “Pangim” CDS, barred oval “1”, double oval Panjim postmark dated 10/3/75, octagonal “BB Bombay” transit mark and hexagonal “Sawantwaree” railway transit mark on the front. The cover is fragile and roughly opened.