Need info on 2 diodes I believe made in ITALY (marked on diodes). Believe part numbers to be 1775/8 and 1776/8. Both are stud mount and used in AC generator circuit. 1775/8 has cathode connected to stud and 1776/8 has anode connected to stud. Any help to get cross reference or parameters would be appreciated. 73 de Arne N7KA