Help with DO identification

After attending Bob Henry's seminar on DO cooking at CRA, I decided to try my hand at using a DO. My mother in-law has given me a DO to use but I have no idea what kind it is. She said it was her grandmothers so I believe it is fairly old but there are no labels or numbers on it. I have seen a post where someone said they would not take a valuable DO camping to keep it from "walking" off and I have to agree. And being a family heirloom I probably won't take it camping either but I will use it to learn on at home.
The oven is 8 inches at the bottom and about 3" deep. If anyone has an idea what type it is, I would appreciate it.
Thanks


The oven is 8 inches at the bottom and about 3" deep. If anyone has an idea what type it is, I would appreciate it.
Thanks