For your consideration, here is a Vintage Metal Claw Shaped Shell Cracker.  It is not marked with a maker.  It works fine.  It has some wear on it.  It measures 5 ¾ inches long and 2 inches at the widest.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (657.4b11c-.8bb)