Optical and technical core of the very precise wristwatch is the fly-mounted three-minute Tourbillon with screwed drive wheel and V-shaped balance bridge. The time display of the gap of ten minutes in the section of the Tourbillon is performed by the hand extension on the scale opposite. The patented double display makes the section from 25 to 30 minutes between the second and the hour display clearly readable. The case and butterfly clasp are of white gold; the alligator strap is hand stitched.