Method for making and decorating a transparent timepiece component

A method for making and decorating a transparent timepiece component and for affixing decorations on both sides of the component, on a top surface and hollow bottom surface separated by the thickness of the component, the method comprising, in the following order:

• in a first station, depositing a first decoration on a male pattern;
• moving into a second station, in an injection chamber complementary to the top surface, either the male pattern provided with the first decoration, or respectively the male pattern provided with the first decoration covered with a transparent preform in the first station or in an intermediate station between the first station and the second station, and injecting a first transparent polymerizable material throughout the injection chamber, to coat with the first material, either the male pattern provided with the first decoration, or respectively, overmolding the male pattern provided with the first decoration covered by the preform, to obtain a first compound including the top face and including the first decoration on the hollow bottom face;
• allowing the first compound injected into the injection chamber to polymerize;
• removing the first compound from the injection chamber;
• depositing a third material and/or a second decoration in a cavity in a third station where the third material and/or second decoration is held by gravity;
• in the third station, depositing the third material and/or second decoration on the top surface of the first compound by a relative motion between the cavity and the third station in the direction of gravity, to obtain a second compound;
• in the third station, waiting until the second compound is handleable;
• removing the second compound from the third station.