Cast iron wood burning stove

Hi, I have this stove. It is made out of cast iron. It is probably late 1800s or early 1900s. There are two markings: one says Model Herald and the other No. 21. It has 3 small doors, one at the top, one at the side and the last at the bottom to collect the ash. It is still in working conditions. If anyone knows anything about it, please let me know.