Automatic movement with a safety device keeping the spring safe from overwinding;
Scale: 12 hrs;
Date calendar of instant action;
Height 1/4 inch (6.3 mm);
31 ruby jewels;
Totally wound movement run not less than 31 hrs.
The hands, clock-face, elements of decoration are covered with phosphor paint accumulating light (superluminova), allowing to see the watch in any conditions, including in the dark.