Allan, John, A Catalogue of the Indian Coins in the British Museum: Coins of Ancient India, London, 1936, original printing, 318 pages, 46 plates, hardcover, mostly Punchmarked coins of the Mauryan Empire and tribal issues of ancient India. Nicely organized to facilitate identification of types. The plates are clear and detailed, ex The Skanda Collection Library.
Estimate: 75-100 USD