Thanks Dwayne, no rush. I will check out the Lodge history as you suggested.
The measurements you asked for (and some you didn't):
Inside diameter = 11 3/8 inches
Outside diameter = 12 1/16 inches
Inside depth = 3 3/4 inches
Outside (not including legs) = 4 inches
Other than being abused, neglected, and now ruined, the inside cooking surface was obviously very nice at one time. Much smoother than some of the other gate marked items I have seen.