Vibrations per hour

From HandWiki
Short description: Mechanical timepiece specification

Vibrations per hour (vph, VPH) is a mechanical timepiece specification. It is used to express the frequency of a watch movement.[1][2] VPH describes the number of times that a vibrating timekeeping component completes a vibration cycle in 1 hour.[3] More vibrations per hour yields higher timekeeping resolution, and usually indicates a higher precision mechanical movement.[4]

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References