The Winchester in question was the fiberglass barreled Model 59. Made to introduce the 14ga (using aluminum shells). I've seen one 14ga Model 59 along with some shells. Astronomical price. Expect only a Winchester collector would be interested.

The gun did OK as a 12ga. The late outdoor writer Frank Woolner cut one down and made it even lighter, and touted it as a grouse and woodcock killing machine.