Method for manufacturing an external component of a watch, of a fashion item or of a jewellery item

A method for manufacturing an external component of a watch, of a fashion item or of a jewellery item, wherein the method comprises the following steps of:

• depositing an inner layer on all or part of a surface of an inner face of a substrate made of a transparent material,
• localised ablation of the inner layer, so as to conserve a part of said inner layer on a first portion of the inner face of the substrate, said ablation being performed so as to form at least one pocket opening onto a second portion of the inner face of the substrate and so as to structure said second portion of the inner face of the substrate,
• treating the surface of the inner layer and of the second portion of the inner face of the substrate,
• depositing an outer layer on all or part of a surface of an outer face of the substrate,
• localised ablation and/or engraving of the outer layer,
• treating the surface of the outer layer.