Question for Planters Products Incorporated (PPI) - Main Office

Good Morning Planters Products Inc. ☺. When we were searching some of our late grandfather's documents last night, we happened to find two certificates of shares bearing the name of your companY which were dated back in 1976. The certificates of shares are named after two of our living family members. IT Was stated there that one holds 3 shares and the other one has 1 share. MAY I ask your good office if these certificates are legit or the shares still have values at present?Thanks for the response.