Abstract: The invention concerns a timepiece display module intended to display a series of alphanumerical characters and/or pictures at different moments. The display module includes a platform (3) arranged to be actuated in rotation about an axis and several wheel sets (5) arranged on the platform (3) so that each wheel set (5) turns on itself while orbiting about the axis of rotation of said platform (3) when the latter is actuated in rotation. The display module further includes several wings (1) which are arranged on each wheel set so (5) as to be positioned in turn at the centre of the display module. Each wing (1) of each wheel set (5) is actuated such that the wings are oriented in a identical plane at the centre of the display module and are adjacent to each other so as to form a central display unit (2).

Abstract: A method of producing a marking on diamond, pearl, precious or semi-precious stone. For producing the marking, the region on the surface to be marked is irradiated with an ArF excimer laser whose output beam is passed through a mask which defines the marking. Identification or security marks may be created. The same process can be used to produce strong and durable extrusion dies having irregular cross sections, and cross sections which vary with depth through the die material.

Abstract: A method of producing a marking on diamond, pearl, precious or semi-precious stone. For producing the marking, the region on the surface to be marked is irradiated with an ArF excimer laser whose output beam is passed through a mask which defines the marking. Identification or security marks may be created. The same process can be used to produce strong and durable extrusion dies having irregular cross sections, and cross sections which vary with depth through the die material.

Abstract: A method of producing a marking on a diamond. For producing the marking, the region on the surface of the diamond which is to be marked is irradiated with an argon fluorine excimer laser whose output beam is passed through a mask which defines the marking. The diamond selectively absorbs the excimer laser radiation and undergoes a partial allotropic transformation without losing its diamond crystal lattice configuration.