Seiko · Prospex
Seiko Prospex Speedtimer Mechanical Chronograph (reference SRQ047J1) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.
A 42 mm Prospex Speedtimer mechanical chronograph with calibre 8R48, about 45 hours of reserve and 100 m water resistance.
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Specifications last verified: 2026-08-14.
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