A pivot arbor for a timepiece movement includes a pivot made of a first non-magnetic metal material at at least one end in order to limit the sensitivity to magnetic fields. An outer surface of the pivot is coated with a first layer of a second material such as Ni, NiB, and/or NiP. The first layer of the second material is partially coated with a second layer of a third material selected from gold, silver, copper, platinum, rhodium, palladium and their alloys.

An escapement mechanism of a timepiece, including: a first escapement wheel, a second escapement wheel called an impulse pinion and a drive pinion; the impulse pinion, the drive pinion and the first escapement wheel being mounted on the same axis; an intermediate wheel meshing with the drive pinion; a balance plate carrying a plate peg and a direct impulse pallet stone arranged to cooperate with the first escapement wheel; pallets including a pallet entry cooperating with the plate peg, an impulse pallet stone arranged to cooperate with the impulse pinion, and first and second support pallet stones arranged to cooperate with the first escapement wheel. The first escapement wheel, the drive pinion and the impulse pinion are mounted in this order.

An escapement mechanism of a timepiece, including: a first escapement wheel, a second escapement wheel called an impulse pinion and a drive pinion; the impulse pinion, the drive pinion and the first escapement wheel being mounted on the same axis; an intermediate wheel meshing with the drive pinion; a balance plate carrying a plate peg and a direct impulse pallet stone arranged to cooperate with the first escapement wheel; pallets including a pallet entry cooperating with the plate peg, an impulse pallet stone arranged to cooperate with the impulse pinion, and first and second support pallet stones arranged to cooperate with the first escapement wheel. The first escapement wheel, the drive pinion and the impulse pinion are mounted in this order.

A train wheel unit is provided with a first wheel which is configured by a material including a conductive polymer and a carbon powder, and a second wheel which is configured by a metal material. The train wheel unit transmits a drive force of an electric motor module which is driven using a battery as an electrical power source.

A train wheel unit is provided with a first wheel which is configured by a material including a conductive polymer and a carbon powder, and a second wheel which is configured by a metal material. The train wheel unit transmits a drive force of an electric motor module which is driven using a battery as an electrical power source.

An elastic retaining member for fixing a timepiece component on a support element includes an opening into which the support element can be inserted, and rigid arms and elastic arms defined between connection areas of the member. The rigid arms and the elastic arms are configured to ensure elastic clamping of the support element in the opening, each of the rigid arms being provided with two flat contact areas of the retaining member and configured to cooperate with corresponding convex contact portions of the support element.

An escapement mechanism including a dual-forked lever having a pivot suitable for movement of the lever between a first pivot limit and a second pivot limit, and at least two rounded follower elements spaced from the pivot and at a predetermined distance from each other. At least one of the follower elements is mounted on each fork of the lever and each follower element lacks a locking face. At least one escape wheel has an outer periphery defining at least a first plurality of cam elements suitable to slidably contact and drive the rounded follower elements, and each cam element lacks a locking surface where contact is made with the follower elements.

An escapement mechanism including a dual-forked lever having a pivot suitable for movement of the lever between a first pivot limit and a second pivot limit, and at least two rounded follower elements spaced from the pivot and at a predetermined distance from each other. At least one of the follower elements is mounted on each fork of the lever and each follower element lacks a locking face. At least one escape wheel has an outer periphery defining at least a first plurality of cam elements suitable to slidably contact and drive the rounded follower elements, and each cam element lacks a locking surface where contact is made with the follower elements.

A component of a winding device, in particular an automatic winding device, of a timepiece movement, wherein it is made of austenitic stainless steel and wherein it comprises at least one friction surface hardened by carbon or nitrogen type atoms introduced into the austenitic stainless steel over a predetermined depth.

A component of a winding device, in particular an automatic winding device, of a timepiece movement, wherein it is made of austenitic stainless steel and wherein it comprises at least one friction surface hardened by carbon or nitrogen type atoms introduced into the austenitic stainless steel over a predetermined depth.