I have one of these, it is a single long spring trap with a jump trap in the center of the long spring trap. Jump trap catches them low and the long sprng high. Trap still works but the spread of the long spring is as far as I can accurately measure about 7 1/2 inches. The jump trap makes it impossible to measure across the center. Is it worth much to a collector?
Not off hand, but assuredly before World War II because of the ring pin. Those ring pins vanished after the War on Animal Trap Company products.
It took a lot of steel to produce that trap. Ergo, they were probably costly in their day.