GTN-M3 GT12 AV 220V 60Hz GT14 obsolete, replaced by GTN-H2; GT-14 AC440V 60HZ GT21, AC 110V 60HZ; GT22 - replaced by GTN-SF1 GT-22 240V AC 60Hz - obsolete, alternative - GTN-SF1; GT-22 AC220V 60HZ GT22 AV 220V 60Hz GT42 - obsolete, replaced by GTN-S1;TIMER GTM-YD GTN-SF1 GTN-1 SERIAL:60519107 GTN-E1 GTN-E2 GTN-E3