Who manufactured the W P Wonder 12 Ga single shot and what years were they made?

The W P Wonder 12 Ga single shot shotgun was manufactured by the W.P. Manufactory, a division of the Winchester Repeating Arms Company. These shotguns were produced primarily during the early to mid-20th century, around the 1930s to 1940s. They are recognized for their simplicity and reliability as a single-shot firearm.