§ 231. Application of quality mark. 1. When an article is composed of
mechanism, works or movements and of a case or cover containing the
mechanism, works or movements, a quality mark applied to the article
shall be deemed not to be, nor to be intended to be, applied to the
mechanism, works or movements.

2. The quality mark applied to the article shall be deemed not to
apply to springs, winding bars, sleeves, crown cores, mechanical joint
pins, screws, rivets, dustbands, detachable movement rims, hat pin
stems, bracelet and necklace snap tongues. In addition, in the event
that an article is marked under the last paragraph of the preceding
section, the quality mark applied to the article shall be deemed not to
apply to pin tongues, joints, catches, lapel button backs and the posts
to which they are attached, scarf pin stems, hat pin sockets, shirtstud
backs, vest button backs and ear screw backs, provided such parts are
made of the same quality of gold as is used in the balance of this
article.