Mains switch. For models Decca 100 SERIES, Decca 1780, Decca 1790, Decca 203292, Decca 30 SERIES, Decca 80 SERIES, Ferguson 00E2159001, Ferguson 03E2122001, Ferguson 06E2023002, Ferguson 06E2024001, Ferguson 16901, Ferguson 2403, Ferguson 2403, Ferguson 3000, Ferguson 3500, Ferguson 36K2, Ferguson 36K3, Ferguson 3792, Ferguson 3792, Ferguson 51L5, Ferguson 51P7, Ferguson 51P7, Ferguson 59L5, Ferguson 59L5, Ferguson 59P7, Ferguson 59P7A, Ferguson 8000, Ferguson 8500, Ferguson C51N, Ferguson E51K8, Ferguson E51P7, Ferguson E51P8, Ferguson E59K7, Ferguson ICC5, Ferguson ICC5, Ferguson RR5991N, Ferguson RR6891N, Ferguson TX10, Ferguson TX10, Ferguson TX89, Ferguson TX9, Ferguson TX9, Ferguson TX98, Gec C2110, Gec C2110H, Gec C223, Gec C2233, Gec C2233H, Gec C2236H, Gec E132103, Gec E132114, Matsui 1460, Matsui 1460, Matsui 1660, Matsui 1660, Matsui 2060, Matsui 2060, Tatung 30, Tatung 80.