50 Pence - Elizabeth II Half Mohur

This is a modern commemorative restrike issued by the British Indian Ocean Territory under license, trading on the historical cachet of the East India Company name — which had, of course, ceased to exist following the Government of India Act of 1858, when the Crown absorbed its administrative functions after the Sepoy Mutiny. The original half mohur was a Mughal-derived gold denomination adopted into Company coinage during the late 18th century.

The KM#57 attribution places this firmly in the BIOT commemorative series, not in any historical EIC issue.