The Butterfly brand #2421 Oven allows you to bake bread, casseroles, etc. using any kerosene stove. The oven is approximately a 14" cube. It is very sturdy and does not fold up. Inside dimensions are 10" high, 11" deep and 12" wide. The door opening is smaller, so for pan sizing, the door opening is 11" wide and 9" high. It will accomodate a 10x10 pan, which will allow a little air space around the sides for more even baking.
The oven will work on any kerosene stove, though it does work better on stoves specifically designed to accomodate the oven. The bottom of the oven has a large square opening. Many of the Butterfly brand stoves have a cooking grate that fits inside the oven's bottom and holds it firmly in place. Stoves that do not have this style grate will still work with the oven, but the oven may not be steady. Many people build an oven frame that holds the oven slightly higher than the stove, so the stove is not actually supporting the oven. You can also use large blocks (cinder blocks, for example) to hold the oven.
The Butterfly brand kerosene stoves that work best with the #2421 Oven are: 2413 single burner, 2418 double burner, 2419 double burner with legs, 2415 triple burner, 2417 triple burner with legs, 2648 double-burner 10-wick and 2487 16-wick. The oven works fairly well on the 2698 22-wick stove. While the 2698 does not have the special grate that holds the oven in place, it has a very large cooking surface that makes the oven steady.
Which stove is the best to use with the oven? Probably the #2487 16-wick. It does have the special grate, plus it has a higher heat output than most of the other stoves, which makes it possible to attain higher cooking temperatures in the oven.
You can read about the Butterfly brand Oven #2421 here: