Dion DiMucci (Belmonts) signed autographed Contract/Agreement 1975 with COA. A Contract that has been autographed by Dion DiMucci. Dion was the lead singer of the famous Doo Wop Group The Belmonts. This contact was signed very nicely by Dion with his FULL NAME which is VERY RARE!! You will receive a COA that offers a Lifetime Guarantee of Authenticity. Thank you for looking at my auctions, please feel free to check back for more great items. Auctiva offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With.