The complex process of mechanical watches, water lock and cooling water system in the combination of a small water lock becomes a big crafts, exquisite and elegant, showing the life rhythm, time moved.
Because the process structure requires this watch core is unable to operate,
So the core can not rotate.
Product material: brass
Thread specification: G1/4 (international general tooth gauge)
Max diameter: 22MM
Product quantity: 1PCS / only
