Spring driven with lever escapement. 17 jewels. Incabloc shock protection device. Manual winding. Caliber Valjoux 7733.
At the edge of are marks of the total station. Left small seconds dial, the right for minute – to 30. On the periphery of the housing right in the middle there is a crown for winding and setting, above button for starting and stopping the stopwatch, and below the reset button.
The chronograph caliber Valjoux 7733 was produced in the period from 1969 to 1978.