Watch i.e. wristwatch, has continuous annular gap allowing only visibility of index on top and not visibility of other movement elements, where support and connection comprise sapphire bridge elements and plate, respectively, on gap

摘要

The watch has a timepiece movement including a tourbillon (10) whose rotary cage (14) is connected to an opaque part of the movement by fixed metallic support and by a kinematic connection. A continuous annular gap (20) allows only the visibility of an index (17) on the top and not visibility of other movement elements. The gap is extended from a circular window (11) between an index perimeter, and a visible part of the cage. The support and the connection comprise transparent annular disks and a transparent rotary base plate, respectively, in the gap. The disks and the plate are made of sapphire.