Bank measures 3 1/3" x 3 1/8". Bank comes with a key. It is NOT the original key but if you put it in to just the first knob (as pictured) and turn clockwise it does open. It may take some finagling but it does work. Bank does have wear and some rust and there is a piece of metal that is partially sticking up through the slot. 

Closely view pics provided. Email me with any questions. 

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