1/4 chain changeover movement with 3 melodies (Westminster, St. Michael and Whittington) on 12-rod gong, power reserve 7 days, plate dimensions 142 x 200 x 2.5 mm, 6 bronze bouchons (additional gears), pallet lever with resting escapement (Graham) and automatic lever, true seconds, separate striking of the hour and melody strike with weight sequence and automatic night shut-off between 10 p.m. and 7.15 a.m., integrated dial locking lever.