There's a painting of the New Calcutta Mint on page 109 of Money - A History published by the British Museum. It was painted by Thomas Prinsep, son of John who built the Fulta Mint, and brother of James who reformed India's weights and measures, and untangled their history through translating their ancient languages. He died of overwork at 40. His medal is pictured on the same page.

Those interested in learning more about the birth of the Calcutta and Bombay mints could do worse than peruse my book, The Soho Mint & the Industrialization of Money. I’ve got an entire chapter in there about the two mints.

I just got back from a couple of weeks in the U.K., centering on Birmingham, where I gave a couple of papers on Mr Boulton.