"Blue Rate" modular timer.
Opens and closes the contact according to a time that can be set between 1 and 7 minutes at 50 Hz (48 seconds to 5.6 minutes at 60 Hz).
This timer has a 2-position switch on the front panel:
automatic operation: timer (after 20 s of operation, pressing the push-button restarts the timer).
forced operation: constant lighting.
Time can be set in 15-second intervals using the thumb wheel.