A Famicom YM-901-S PRIZE! This yellow version Super Mario Bros, game, watch and padded diskun (Mr.Disc) case was a prize given out to the winners of the 3rd Tournament (F-1 Grand Prix) of a series of 4 Famicom disk system tournaments held in the 1980s in Japan only. Seller in Japan ships worldwide.
Famicom Super Mario Game & Watch on ebay.com
Retro Treasures, finding the stuff other people walk past....
sigh! Slogan needed.