This is one of the fun ones. Everybody enjoys this set when they see it. The ship measures 12″ x 2.75″ and the submarine is 9″ x 1.75″. The overall design is very sleek and simple. Even the trigger release on the sub has been reduced to a small piece that protrudes above the deck just enough for it to be pressed with a finger. The ship has a mousetrap spring in the center and when the red target is struck all of the upper decking explodes off of the hull. The explosion sends off four separate pieces. The box is labeled Keystone Wood Toys so it was produced in 1953 but does not appear in the 1954 catalog.
From my private collection.