I finally opened a Winchester Art Portfolio by A. B. Frost and the plates are stunning. I got this from a Winchester employee that retired after 32 years when they moved the factory overseas. The cover is 19 x 13 inches and the plates are 18-1/2 x 12-1/2 inches. On one side of the portfolio is a pocket for the plates and on the other side you have a short story that goes with each plate.
There's a hunting scene for everyone in the forum. Enjoy..