1. a Mechanical Watch or clock mechanisms, mechanical, that rely on the movement of the gear teeth within the collection mechanism that gets propulsion from the spring yard work, clock. At present, divided into two groups:
1. Mechanical Watch or mechanical watches. The backlash in the movements of the internal mechanism was driven from Milan to make a clock spring walk. Currently divided into 2 groups.
1. Mechanical Watch clock mechanism or machine. Relying on the movement of the gear mechanism within the driving force from the spring to make the clocks, walk, currently divided into 2 groups.