A cast iron Clown and Harlequin mechanical bank, produced by J&E Stevens Co circa 1907, will carry an estimate of $125,000-175,000 to Morphy Auctions' February 15 sale in Denver.
The lot, designed by James H Bowen, is among the rarest and most desirable mechanical banks - with the example offered in the sale the finest known.
The design is based on the Italian Commedia Dell'arte and features three of the stock characters (the clown, columbine and harlequin.
When a coin is placed in the slot, the clown and harlequin swing round - a motion that sets the columbine spinning.
A near mint example sold for $103,300 at Morphy Auctions in 2007.
A Cat and Mouse mechanical bank, also designed by James H Bowen for J&E Stevens, is valued at $18,000-25,000.
The mechanism features a cat, which emerges to perform a somersault while holding the mouse, and is in near mint condition.
Another near mint example realised $31,200 at Morphy in 2012.
The finest known example of a cast iron artillery target bank, designed by Samuel Clark circa 1877, is offered with an identical estimate of $18,000-25,000.
The coin is inserted over the target before a spring-loaded cannon fires a ball that knocks the coin into the body of the bank.
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