Mohur
The Mohur is a gold coin that was formerly minted by several governments, including British India and some of the princely states which existed alongside it, the Mughal Empire, Kingdom of Nepal, and Persia (chiefly Afghanistan). It was usually equivalent in value to fifteen silver rupees. It was last minted in British India in 1918, but some princely states continued to issue the coins until their accession to India after 1947. Similar coins were also issued by the British authorities in denominations of mohur (10 rupees), mohur (5 rupees) and the double mohur (30 rupees), and some of the  princely states issued half-mohur coins (equal to 7 rupees and 8 anna). The "mohur" coin was first introduced by Sher Shah Suri during his rule in India between 1540 and 1545 and was then a gold coin weighing 169 grains (10.95 grams). He also introduced copper coins called "dam" and silver coins called "rupiya" that weighed 178 grains (11.53 grams). Later on, the Mughal emperors standardized this coinage of tri-metallism across the sub-continent in order to consolidate the monetary system. Etymology. The word "mohur" or "mohor" (from the Persian word "muhr", which means "seal" or "signet ring ) is cognate with the Sanskrit word mudrā", which in turn comes from "mudraṇam", which also means "seal". Collector value. Gold mohurs issued by the Moghul Empire, the British East India Company or the British Crown are valuable collector items and sell in auctions for high prices. The double mohur (minted between 1835 and 1918) with a value of 30 rupees is the highest denomination circulating coin issued till date. An 1835 double mohur was sold at a Bangalore auction for ₹11.5 lakhs making it the highest ever coin bid in India.