Certina 28-45 Watch Spare Parts: Full Guide for Collectors and Watchmakers
The Certina 28-45 is a classic Swiss automatic movement produced from the early 1950s to 1960, renowned for its reliable performance and robust construction. With a 28mm diameter and a power reserve of around 42 hours, it was one of Certina’s early larger-diameter automatics, continuing the robust design philosophy of the earlier 25-45 series but increasing the case size and presence.
Key Technical Specifications
Movement Type: Automatic mechanical
Calibre: Certina 28-45
Diameter: 28 mm (12.5 lignes)
Height: Approx. 6 mm
Jewels: 21 synthetic jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 42 hours
Functions: Sweep seconds, automatic winding
Common Spare Parts
Mainspring: Proper size (e.g., 1.20 x 0.100 x 10.0 mm, auto) is crucial for steady power output.
Balance Assembly: Includes balance wheel, hairspring, staff, and regulator for accurate timekeeping.
Escape Wheel & Pallet Fork: Critical escapement parts for consistent operation.
Gear Train Wheels: Center, third, and fourth wheels transmit energy efficiently.
Setting and Winding Components: Stem, crown, clutch wheel, setting lever, and springs for smooth manual operation.
Oscillating Weight: Integral part enabling automatic winding mechanism.
Plates, Bridges & Screws: Provide structural strength to the movement.
Jewels: Synthetic rubies reduce friction and wear on pivots.
Hands & Dial Components: Vintage-style replacements help preserve original appearance.
Maintenance and Sourcing Tips
Confirm the calibre “28-45” marking before ordering spare parts for compatibility.
Prefer New Old Stock (NOS) or genuine donor parts for long-term reliability.
Carefully handle balance, escapement, and winding mechanisms during servicing.
Use lubricants designed for vintage automatic Swiss movements.
Specialist vintage watch suppliers and online vendors carry a variety of 28-45 parts.
Importance of Genuine Spare Parts
Maintains accuracy, reliability, and durability.
Preserves the historical and collectible value of the watch.
Supports professional restoration and ensures original style and function.
Using genuine parts helps your Certina 28-45 remain a true representation of Swiss watchmaking excellence.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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