1/4 spring-wound movement with echappement (Swiss anchor escapement, 5 jewels), Westminster strike on 5-bar gong (underbeater), duration 7 days, plate size 100 x 104 x 1.7 mm, 6 Aeterna bronze bouchons (accessory wheels), barrels with quick-release axle, front winding with safety winding stop and automatic night shut-off between 22.00 and 7.15 clock.