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A calibre is the specific model designation for a watch movement, identifying its particular design, dimensions, and specifications. Each calibre has a unique number (e.g., Rolex Cal. 3135, ETA 2824-2) that identifies the movement's origin, architecture, and capabilities. The calibre is the heart of the watch, determining its accuracy, complications, and serviceability.
The calibre is often engraved on the movement itself, visible through a transparent caseback. Brand documentation, the original papers, or the manufacturer's website lists calibres for each reference. Third-party databases like Ranfft Movement Database or watch journalism sites document calibres for most production watches.
Yes significantly. In-house calibres from prestigious brands command premiums and affect collectibility. Common movements like ETA 2824 are easy to service worldwide at lower cost. Proprietary calibres may require factory service. Discontinued calibres can be costly to service due to scarce parts. Calibre choice affects long-term ownership costs.
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