To adjust their time or date, the wearer would have to unscrew the crown, which is an intentional motion and ensures that the screw down crown is tightened during regular use. This mechanism not only makes the watch stronger and functional in harsh conditions, but it also enhances its look as solid and professional.
Screw-Down Crown
A screw-down crown is a watch crown tightened against the watch case with screws. This design improves water resistance in the timepiece. During this process, the crown's threads are determined to marry up with the watch case such that when screwed down, the crown creates a watertight seal preventing water, dust, and other small deleterious substances in the movement. Screw down crowns mainly feature the dive watches and other timepieces meant to work underwater.
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