There are very few true "Salesman" sample items.
A skillet as small as the one you posted is definitely a toy, and very probably to a toy stove, or doll house furniture.
Many are newer items... after 1950.
Toy Stoves and accessories, and doll house accessories are, an entirely different learning curve separate and apart from Cast Iron Cookware. :) :)
There are older Toy Stoves, but many, many, more reproductions of them. It is a science unto itself. 8-)