The city of Amsterdam, which owned the Bank and guaranteed the deposits, derived from it a considerable revenue, but was responsible for the losses too. The bank seems to have hardly supported the Dutch West India Company but in 1637 the Stadsbank van Lening did. It provided the Admiralty of Amsterdam and the mint masters in Enkhuizen, Harderwijk, Kampen, Medemblik, Zwolle and Utrecht, booked as private loans. In 1645, for which year ledgers of the Wisselbank are available, the firm Coymans was the largest account holder at the bank with a turnover of over 4 million guilders. In 1652 (First Anglo-Dutch War) the Wisselbank made no profit. In 1666 Jan de Neufville (1613–1663) and the Coymans company each settled more than 3.5 million guilders with the Amsterdam Wisselbank. In 1672 (Third Anglo-Dutch War) the Exchange bank in Amsterdam was stormed by private account holders who wanted to withdraw their money. Magistrates had the cellars opened where the money was kept. According to Voltaire: it turned out that it was lying there completely untouched, as it had been for sixty years. Johan Huydecoper, Joan Geelvinck, and his father Cornelis Geelvinck were commissioners in the Year of Disaster. In the year after the Wisselbank booked a loss.