Chain-wound movement with bim-bam 1/2-hour strike on 70 mm rear bell, 7-day power reserve, plate dimensions 114 x 99 x 2.0 mm, Kieniramic7 solid anchor with resting escapement (Graham) and automatic anchor, seconds display, strike cut-off and automatic night shut-off between 10 p.m. and 7 a.m.