Tissot serial numbers by year. The very early Tissot watches had the serial number engraved on the back site of the dial. Later on the serial numbers were made easier to locate. On most vintag Tissot watches you will be able to find the serial number engraved into the watch movement. Find the four-digit number on the back of the watch case. This is the model number. The eight-digit number with letters is the serial number. Both numbers are used to identify the Cartier model.

1. Cartier Watch Serial Number Database
2. Cartier

Cartier Watch Serial Number Database

Cartier

Designing a Cartier Fine Watchmaking movement is a long, complex and rigorous process that requires a combination of manual skills and advanced technology. Everything starts with an idea loosely sketched by the designers. Freehand drawings show the basis of an inventive mechanism, with all the finishes already faintly indicated. These flat drawings of the principal features are preparation for the three-dimensional design of each piece that will allow the watchmakers to validate its feasibility. This is also the preliminary stage of producing an over-sized model used for checking the functionality of the movement. Later, real prototypes are produced and tested before being approved.