Certina 28-15 Watch Spare Parts: Essential Guide for Collectors and Watchmakers
The Certina 28-15 is a Swiss manual winding mechanical movement widely appreciated for its reliability, precision, and robust construction. Introduced around 1967, this calibre measures 28.4 mm in diameter with a height of 4.4 mm, featuring 17 synthetic jewels and running at a steady 18,000 vibrations per hour (vph). It boasts a power reserve of approximately 46 hours and offers both sweep seconds and day-date complications.
Key Technical Specifications
Movement Type: Manual winding mechanical
Calibre: Certina 28-15
Diameter: 28.4 mm (12.5 lignes)
Height: 4.4 mm
Jewels: 17 synthetic jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 46 hours
Functions: Sweep seconds, day and date display
Common Spare Parts
Mainspring: Sized 1.50 x 0.120 x 320 x 9.5 mm, critical for consistent power delivery.
Balance Assembly: Includes balance wheel, hairspring, staff, and regulator responsible for accurate timekeeping.
Escapement Components: Escape wheel and pallet fork regulating movement precision.
Gear Train Wheels: Center, third, and fourth wheels ensure smooth energy transmission.
Date and Day Mechanism: Date dial unlocking yoke, date jumper, day dial mid, and day jumper spring for calendar functions.
Setting and Winding Parts: Stem, crown, clutch wheel, setting lever, springs for manual winding and time setting.
Plates, Bridges & Screws: Structural components holding the movement together.
Jewels: Synthetic rubies reduce friction and wear.
Hands & Dial Components: Authentic components essential for vintage restoration.
Maintenance and Sourcing Tips
Confirm the calibre “28-15” marking prior to ordering parts to ensure compatibility.
Prefer New Old Stock (NOS) or trusted donor parts for authentic restoration.
Handle delicate escapement and calendar parts carefully during servicing.
Use lubricants specifically designed for vintage manual wind Swiss movements.
Specialist parts suppliers and vintage watch dealers stock various components for 28-15 calibre.
Importance of Genuine Spare Parts
Maintains accuracy, durability, and reliable operation.
Preserves the watch’s historical authenticity and collector’s value.
Supports professional restorations that result in long-lasting performance.
Using genuine parts guarantees your Certina 28-15 watch continues to perform with classic Swiss precision and craftsmanship.
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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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