| 摘要 |
PROBLEM TO BE SOLVED: To provide an adjustment weight, a movement and a timepiece in which resistance received by a weight for adjustment during rotation of a balance wheel is suppressed, and an inertial movement of the balance wheel can be set to a desired adjustment width.SOLUTION: In an adjustment weight 300 provided in a balance wheel 200 for timepiece speed control and adjusting an inertial movement of the balance wheel, a trunk 301 is equipped which is provided so as to be rotatable around the center of an axis 215 equipped in the balance wheel. The trunk includes: a lower surface 307 intersecting with the axis; and an upper surface 306 which regulates the thickness of the trunk in the axial direction between the lower surface and which is formed so that the thickness is reduced as progressing toward the peripheral edge 310 from a ridge line R passing through the axis. |
