1/4 chain-operated changeover movement with 3 melodies (Westminster, St. Michael & Whittington) on 12-rod gong, 7-day power reserve, plate dimensions 131 x 131 x 2.0 mm, Kieniramic7 solid anchor with resting escapement (Graham) and automatic anchor, strike shut-off and automatic night shut-off between 10.00 pm and 7.15 am.