COLE A.F.D. 310A BATTERY SELECTOR SWITCH

"Cole Hersee" type Battery Selector Switch with AFD (Alternator Field Disconnect). 
Allows to isolate the battery, to select one of two batteries, or to select both of them at the same time. Protects the alternator's diodes in the event of the switch being set to "OFF" while the engine is running. Dim: ø 160 mm x H70 mm.