A watch including a display, a glass (6) arranged above the display and having a useful area (9) through which a user can see the display, and a lighting device including an electroluminescent unit (14a) arranged under the glass and formed by a
light source, in particular an LED or
OLED. The electroluminescent unit is electrically powered, from
peripheral contact zones (30a to 30d) superimposed on the rim of the glass, via conductor pads (22g to 22j), made of transparent conductor material, that cover all of the useful area except for interstices (26a to 26d) separating the conductor plates, at least in the useful area. Each interstice separates two adjacent conductor areas and has a width, in particular less than 100 µm and preferably less than 50 µm, that makes this interstice imperceptible at a distance of approximately 30 cm, in normal ambient light, for a user.