Thank you Will and Russell for taking a look. I kind of figured identifying a maker would be close to impossible, but was hopeful someone noticed a detail that might yield a clue.
I am more interested in a guess as to when it may have been produced. I find the age of my cookware more interesting than who made it. As mentioned before, I believe it has a gate mark and thanks for the info of gate marks being used into the 1920's.
The top surface is nice and smooth with a few casting flaws, but definitely lacks the machine milling marks found on some of the pans I have from the 40,50 and 1960's. I am talking about those nice concentric circles starting from the center and spiraling outwards. What type of process did they use before machine smoothing was introduced?
At first I assumed the missing section on the rim was simply broken off, but after cleaning and closer examination it has me wondering. It is pretty symmetrical and the missing edge is rough casting just like the entire bottom of the griddle. I am sure it is just wishful thinking. lol. Luckily I am just a cast iron user and not collector so it has no impact to me. The griddle cooked up some perfect pancakes on the initial run.
It did clean up pretty well with minimal effort and under $10.00 to boot. Anyone care to venture a best guess on age?