1 Mohur - Gulielmus IIII

The William IV mohur was struck at the Calcutta Mint beginning in 1830, the same year William IV ascended the throne following the death of George IV. The East India Company had been issuing gold mohurs under British royal authority since the late eighteenth century, but this series coincided with a period of intense parliamentary scrutiny — the Company's charter was due for renewal in 1833, and the renewal ultimately stripped it of its remaining trade monopolies entirely.

Calcutta mohurs of this type are notorious for uneven surface quality due to the mint's reliance on locally drawn gold of inconsistent fineness, which required periodic assay adjustments mid-production.