Seiko SRQ055 Prospex Speedtimer Automatic Chronograph Black Dial
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The Seiko Prospex Speedtimer SRQ055 honors the legacy of 1969's groundbreaking original, the world's first automatic chronograph to combine a column wheel and vertical clutch.
This 2025 iteration refines that pioneering design with an external tachymeter bezel that creates a cleaner, more balanced dial while maintaining the technical sophistication that defined its predecessor.
Inside the 42mm stainless steel case with super-hard coating beats the proprietary Caliber 8R48, a 34-jewel automatic movement operating at 28,800 vibrations per hour. The column wheel and vertical clutch ensure smooth chronograph operation, measuring elapsed time up to 12 hours in 1/8-second increments, while a three-pointed hammer system delivers instantaneous, synchronized reset. With 45 hours of power reserve and manual winding capability, this movement balances precision with practical versatility.
The matte black dial carries the historic "Speedtimer" designation above a tri-compax layout: 30-minute counter at nine, 12-hour counter at six, and small seconds at three. LumiBrite-treated markers and hands provide excellent low-light visibility, while the date window sits discreetly between four and five o'clock. Fitted with a refined multi-link bracelet, dual-curved sapphire crystal with anti-reflective coating, and three-fold push-button clasp, the SRQ055 offers 100 meters of water resistance for genuine everyday versatility.
The Seiko Prospex Speedtimer SRQ055 honors the legacy of 1969's groundbreaking original, the world's first automatic chronograph to combine a column wheel and vertical clutch.
This 2025 iteration refines that pioneering design with an external tachymeter bezel that creates a cleaner, more balanced dial while maintaining the technical sophistication that defined its predecessor.
Inside the 42mm stainless steel case with super-hard coating beats the proprietary Caliber 8R48, a 34-jewel automatic movement operating at 28,800 vibrations per hour. The column wheel and vertical clutch ensure smooth chronograph operation, measuring elapsed time up to 12 hours in 1/8-second increments, while a three-pointed hammer system delivers instantaneous, synchronized reset. With 45 hours of power reserve and manual winding capability, this movement balances precision with practical versatility.
The matte black dial carries the historic "Speedtimer" designation above a tri-compax layout: 30-minute counter at nine, 12-hour counter at six, and small seconds at three. LumiBrite-treated markers and hands provide excellent low-light visibility, while the date window sits discreetly between four and five o'clock. Fitted with a refined multi-link bracelet, dual-curved sapphire crystal with anti-reflective coating, and three-fold push-button clasp, the SRQ055 offers 100 meters of water resistance for genuine everyday versatility.
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Frequently Asked Questions
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Common repairs include ring sizing, polishing, rhodium plating, adjusting chain length, replacing clasps, re-stringing services, and more.
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