Welcome to WAGS, Jordan.  While there's no absolute concrete proof, the general consensus is that this may have been made by Favorite Stove & Range or Chicago Hardware Foundry with Favorite patterns after Favorite went out of business.  Wish I knew more, but I don't.
The C inside the diamond?  Who knows what that signifies.  Most of the regular skillets have size numbers inside the diamond.  Again, I wish there were more info available.