B50 oil pressure switch

[Kajay]

Hi All,
Did B50s come from BSA with oil pressure switches? I can't see one in my parts list/manual and mine has the hole blanked off. But on looking at pictures I can see some clearly have!
Ta
Ken

[ANDY HIGHAM]

B50s don't need an oil pressure switch because they don't have oil pressure. Roller big end, high flow very low pressure