A Gensign using a T & N (Telefonbau & Normalzeit)

German movement.

The two red circles show the two contacts that, when they meet, activates the electro magnet. This is the two cream coloured objects at the top.
The screw head circled in blue is the beat adjuster for the pendulum. This allows the clock to get perfectly 'in beat' ( an even 'Tick' Tock') by moving the pendulum in the horizontal plane in relation to the pallets on the escape wheel