Mr. and Mrs. Edward Plewniak of Valrico, Fla., formerly of Buffalo, celebrated their 60th wedding anniversary with family and friends in Excalibur Hotel, Las Vegas. Plewniak and Agnes Kosin were married June 3, 1944, in Transfiguration Catholic Church, Buffalo. He is a retired manager of transportation for S.M. Flickinger Co.; she is retired from the production department of General Electric Co. The couple has two children, 10 grandchildren and 10 great-grandchildren.