Certina 17-251 Watch Spare Parts: A Guide for Collectors and Restorers
The Certina 17-251 is a Swiss-made manual wind mechanical movement, famed for its robust engineering and inclusion of a date function within the compact 7.75 ligne form factor. This calibre is highly regarded among vintage watch enthusiasts and remains a staple for collectors and those repairing mid-century Certina models.
Key Technical Specifications
Movement Type: Manual wind, mechanical
Calibre: Certina 17-251 (also known as Kurth 17.251, K.F.G. 17-251)
Size: 7.75 lignes (approx. 17.0×24.8mm, tonneau/rectangular shape)
Jewels: 17 synthetic jewels
Beat Rate: 19,800 vibrations per hour (vph)
Functions: Sweep seconds, date complication, Swiss lever escapement
Era: Mid-20th century to 1970s
Essential Spare Parts
Mainspring: Critical for consistent timekeeping power delivery.
Balance Assembly: Balance wheel, staff, hairspring, and regulator for accurate regulation.
Escape Wheel & Pallet Fork: Vital for reliable escapement action.
Gear Train Components: Includes barrel (drum and cover), barrel arbor, center wheel (with or without cannon pinion), third, and fourth wheels.
Date Mechanism Parts: Date jumper, date disc, date star, and calendar springs ensure precise date function.
Winding and Setting Parts: Stem, crown, yoke, set lever, clutch wheel, and associated springs for proper manual operation.
Hands & Dial Components: Vintage-compatible replacements to maintain authenticity.
Plates, Screws, and Bridges: Key structural and assembly components for durability.
Jewels: Synthetic, to minimize friction and wear over time.
Shock Protection System: Where present, includes KIF/Incabloc springs and cap jewels.
Maintenance & Sourcing Tips
Confirm the “17-251” calibre marking to ensure part compatibility.
Prefer New Old Stock (NOS) or genuine donor parts for ideal fit and performance.
Handle escapement and date mechanism components with utmost care.
Use lubricants formulated for vintage Swiss movements to prevent damage.
Major vintage watch part suppliers regularly stock these parts for collectors and professional watchmakers.
Why Use Genuine Spare Parts?
Maintains accuracy, reliability, and long-term function.
Preserves the collector’s value and historic significance of your Certina 17-251.
Supports thorough and professional restoration work.
Authentic parts keep your Certina 17-251 running true to its Swiss legacy.
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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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