Mechanical timepiece comprising a tourbillon

摘要

The invention relates to a timepiece consisting of a main plate ( 24 ) having the following components mounted thereto: a time base which is formed by a tourbillon ( 16 ) comprising a rotatable frame, which appears in an opening ( 14 a) in the dial ( 14 ) thereof; and time information display means which are controlled from the time base. The aforementioned display means comprise a rotatable ring ( 40 ) which appears in the opening ( 14 a) in the dial, co-axially around the frame, and ring drive means.