I come across old Lodge camp ovens from time to time. I picked up a 12" oven this weekend that had almost no markings on it. I could identify it as a Lodge by the shape of the bail mounts. The lid only had a raised "12" on it, which I have seen before on ovens that had stamped (indented) markings on the bottom. This oven only seems to have a raised "12" on the bottom of it as well. It appears to have a pretty good finish on it, except for some rust that I am trying to remove. My question is, when did Lodge start putting the stamped markings on the bottom of their ovens? My guess is they did this in the 1950's or whenever they went to a machine mold. I'm assuming that this oven that I found was before that, possibly in the 1940's or earlier. Any ideas on this?