Cock - Amateur

: The most delicate step is ensuring the upper pivot of the balance staff perfectly enters the jewel hole in the cock. If the screw is tightened while the pivot is misaligned, the staff will break.

For those interested in the artistic side, historical watches often featured highly decorative, hand-engraved balance cocks (sometimes called "watch cocks"), which are now prized by collectors as miniature works of art. How to fix balance wheel movement issue? - Facebook amateur cock

: If a balance wheel stops moving when the cock is tightened, it may be due to insufficient vertical clearance (endshake). Some amateurs resolve this by "shimming"—placing a tiny piece of paper or metal foil between the cock and the mainplate to raise it slightly. : The most delicate step is ensuring the