Answer:
The Calcutta Cup is made from melted down silver rupees. This money was what was left of the funds of the Calcutta Rugby Club when it was disbanded in 1878. The club had been formed in 1873, but lack of players hastened it's demise. The 'Calcutta' Cup was presented to the RFU to be presented to the winner of the annual England/Scotland match, as the original club had been born out of a match organised between 20 Englismen and 20 Scots, Irishmen and Welshmen on Christmas Day 1872.