The later money boxes fit a cast iron plate in the bottom of the piano. They are four inches wide, six inches deep, seven inches high. See the pictures at the links below. Don Teach Shreveport, Louisiana [ http://www.mmdigest.com/Attachments/16/08/22/160822_170140_Img_1772a.jpg [ http://www.mmdigest.com/Attachments/16/08/22/160822_170140_Img_1773a.jpg [ http://www.mmdigest.com/Attachments/16/08/22/160822_170140_Img_1774a.jpg [ http://www.mmdigest.com/Attachments/16/08/22/160822_170140_Img_1775a.jpg