FIELD: watches.
SUBSTANCE: invention relates to a balance for a watch mechanism, containing rigid parts, which include a hub that determines the axis of rotation of the said balance, a rim, four spokes connecting the said rim to the hub, and including four grooves for insertion into them and clamping inertial bodies in a predetermined position, wherein each groove is formed on one side by a spoke, and on the other side by an elastic tab containing the first end, made in one piece with said spoke, and the second, far end, free with respect to said hub, said spoke and said rim sector. According to the invention, the balance contains two pairs of inertial bodies, with each pair of inertial bodies having a different mass to provide different adjustment possibilities, the first pair of inertial bodies is intended for basic regulation, and the second pair of inertial bodies is intended for fine regulation.
EFFECT: providing easy and fast regulation of balance inertia.
10 cl, 1 dwg
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