Valentine, W. H., The Copper Coins of India; Part I, Bengal and the United Provinces, London, 1914, original printing, 266 pages, line drawing plates throughout, hardcover. Good reference on Mughal, north Indian copper of Native State & East India Company period. Excellent line drawings with legends transliterated. Even with Krause and Mitchiner this is still useful and Valentine numbers are sometimes referenced, ex The Skanda Collection Library.
Estimate: 30-50 USD