American piggy bank in cast iron from the early 1900s with mechanical action

Particular antique American piggy bank in painted cast iron, made in the first decades of the 1900s, with characters that move thanks to a mechanical action that allows the coin placed on the tray of the girl inside the piggy bank to drop. At the same time the dog wags its tail. Other similar piggy banks available from the same collection.
Measurements: 18 x 8 cm, height 20 cm.