Synchronous MSDC motor-driven solar dial time-switch
Synchronous motor-driven solar dial time-switch, type MSDC, fitted with special fast clock revolving once per minute, to show operation of switchgear
Synchronous motor-driven solar dial time-switch, type MSDC, fitted with special fast clock revolving once per minute, to show operation of switchgear with a cast metal case
Synchronous motor-driven solar dial time-switch, type MSDC, fitted with special fast clock revolving once per minute, to show operation of switchgear
Cast metal case for synchronous motor-driven solar dial time-switch, type MSDC, fitted with special fast clock revolving once per minute, to show operation of switchgear