Guido Tesi;83;of 801 Grant St.;Belle Vernon;died suddenly at 8 p.m. Wednesday;Feb.26;1975;in Charleroi Division of Mon Valley Hospital. He was born in Pistoia;Italy;on Sept.27;1891;and resided in Belle Vernon the past 73 years. Mr.Tesi was a member of St.Sebastian Catholic Church;Belle vernon;the Garibaldi Lodge of Dunlevy and the Italian Beneficial Society of Belle Vernon. He retired in 1960 from the Monessen Plant of Wheeling-Pittsburgh Steel Corp. Surviving are his widow;Bruna Biagi Tesi;one son;Raymond J.Tesi of Boiceville;N.Y.;one daughter;Mrs.Paul (Vilma Mae)Morris of Washington;one sister;Mrs.Albert (Lena) Venneri of Monessen;and four grandchildren. Friends will be received at the Shelby D.Ferguson Funeral Home;Belle Vernon;from 7 to 9 p.m.Thursday and from 2 to 4 and 7 to 9 p.m. Friday. Prayers will be recited at the funeral home on Saturday at 9:30 a.m.;followed by Mass of Christian Burial at 10 a.m. in St.Sebastian Catholic Church;Belle Vernon. Interment will be in Belle Vernon Cemetery. Shelby D.Ferguson is funeral director in charge.