Wristwatch case, has retaining units removably connected to case base, where surface of each retaining unit stays in contact with case ring opposite to case base and has approximately same inclination as that of lateral surface of ring

摘要

The case has a case ring (1) incorporated with a crystal and a case base (3). Retaining units (4) are removably connected to the case base, and the case ring is held at the case base. Lateral surface of the case ring is conical and has greater diameter at the case base. Surface of each retaining unit stays in contact with the case ring opposite to the case base and has approximately the same inclination as that of the lateral surface.