Bolo Portable Oven
Be sure to examine a Griswold Bolo Oven before you purchase a portable oven. Remember that it is the only portable oven which bakes fast and slow at the same time!
Look at the shelf in the center. That’s the adjustable flue-plate which divides the oven into two absolutely separate compartments. The lower heats up quickly and that makes your fast oven. The upper heats from the overflow, without extra cost, and becomes your moderate oven.
It’s wonderful how much baking you can get done in a few hours with this double oven space!
Bolo Portable Oven Advertisement, Good Housekeeping Magazine, June 1921.