| 摘要 |
The crown screw (1) has a central part (6) which consists of a winding tube (10) and plate (12) attached to a head (2). The head may be screwed to a case tube by means of a threaded (16) ring (18). A substrata (20) which bears a logo or design (M) is held between a shoulder (24) of the head and the plate top (12a) and may be rotated against a braking ring (28) to align the logo after winding |
