Finally found a redhead on Craiglist.
Since there is no Vent Code and it has the patent number, I figure it is a 70's model before 1979.
An 18" kettle for $15.00. It does have 3 chips in the coating. One is about the diameter of a coke can. Not sure if I will try to mask off and paint with the dupli engine paint.
Here's the original shape:
After a bit of work:
Sanded the handle and stained a bit: