Handled Cast Iron Gem Pan. The sections of this Gem Pan are patterned after the Waterman #4. The cups are 2 1/2" X 4 5/8" with a 5" handle. It is not marked. This unique handled Gem Pan is from the David G Smith collection.
Nathaniel Waterman from Boston patented the egg pan with multiple cups. The individual cups allow for even heat for item.