Antique Tramp Art Coin Bank Puzzle

Sweet little ole handmade tramp art coin bank. Has a way in but as far as I can tell, no way out. Perhaps a puzzle or you just have to break it open— but please don’t! 

Condition: this is a handmade antique and therefore not perfect. Has some marks and areas of wear. Presents beautifully and functions as it should

Measurements:  4” x 4”