Certina 17-221 Watch Spare Parts: Expert Guide for Collectors and Watchmakers
The Certina 17-221 is a well-regarded automatic movement from the golden era of Swiss horology, produced around 1970. It is prized for its precision, durability, and high jewel count, making it popular among both collectors and professionals restoring vintage models.
Key Technical Specifications
Movement Type: Automatic
Calibre: Certina 17-221 (also Kurth 17.221, K.F.G. 17-221)
Size: 7.75 lignes (approx. 17.2mm diameter)
Jewels: 25 to 32 synthetic jewels (depending on variant)
Lift Angle: 51°
Beat Rate: 21,600 vibrations per hour (vph)
Power Reserve: 39 hours
Functions: Automatic winding, sweep seconds, date display
Period Used: Circa 1970
Frequently Needed Spare Parts
Mainspring: Essential for consistent power; precise size and fit required.
Balance Assembly: Complete balance, hairspring, staff, and regulator for accurate timekeeping.
Oscillating Weight & Automatic Device Module: Powers self-winding function.
Gear Train: Center, third, fourth wheels, and barrel for smooth energy transfer.
Escape Wheel & Pallet Fork: Key for escapement reliability and precise motion.
Setting and Winding Mechanism: Stem, crown, setting lever, yoke, and associated springs for time-setting and winding.
Date Components: Date disc (e.g., No. 2557-1), date star, intermediate wheels, and calendar springs for reliable date function.
Bridges, Plates, Screws: Provide structural integrity during assembly and use.
Hands & Dial Parts: Must match vintage specs for authenticity.
Shock System: Top/bottom block, cap jewels, and springs, ensuring durability.
Maintenance and Sourcing Tips
Confirm the marking “17-221” before ordering for perfect compatibility.
New Old Stock (NOS) or genuine donor parts are preferred to maintain fit and function.
Handle delicate escapement, date, and automatic parts with care.
Apply correct lubricants designed for high-frequency vintage automatics.
Leading vintage watch parts specialists offer wide selections for Certina 17-221 repairs.
Importance of Genuine Spare Parts
Ensures accuracy, dependability, and movement longevity.
Maintains the historical value and collector appeal.
Supports professional and lasting restoration.
Using authentic parts keeps your Certina 17-221 a prime example of vintage Swiss engineering.
You can confirm the order by making a PayPal payment. My account email address is [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340