Super Mario Bros.

About

A special edition of Game & Watch Super Mario Bros. It was a prize for the Famicon's F-1 Grand Prix tournament on August 1, 1987 with the code YM-901-S. It is a single-screen single-player game with a yellow case. It came in a plastic box modeled after Disk-kun, the Famicom Disk System mascot. This edition is the rarest of all Game & Watch models, with only 10,000 units produced and never available at retail.

Source: IGDB