8-day spring movement with balance-wheel regulator, winding and hand-setting at the front. 1h and 1/2 hour strike.

type of strike: 2 hammers on top, 2 bells on top Ø 46/51 mm 
Fixing: by 4 straps
Dimensions: B 85 x H 98 x D 60 mm
depth: 87mm
Minute hole: 2.0 x 2.0 mm
Hour hole: Ø 4.5 mm