Bank Leu Auction 51 A Bostonian Collection. Auction 51. Zurich, 24-26 October 1990. Coins and Medals of the European Colonial Powers, their Colonies and the Independent Successor States in the Americas, the Caribbean, Africa and Asia; Coins of the European Trading States, Trade Tokens and Coin Weights; Literature on Medieval and Modern Numismatics. Brossura ed. pp. 414, lotti 2349, ill. in b/n. Ottimo stato.