My husband and I found a very large dutch oven in an antique store. We purchased it, brought it home, and cleaned it. It has only the number 12 on the bottom at 6 o'clock. The dimples on the inside of the lid resemble Birmingham Stove and Range pieces that we've seen before. The dimples are regularly spaced, so they appear to be like those in the Century Series. There's a finger hold on one side of the kettle and a pour spout on the opposite side. The lid has ears/pour spout covers. The funny thing is that I can't find any record of BS&R making a dutch oven larger than #10. Can anyone help?