Certina 25-451 Watch Spare Parts: Comprehensive Guide for Collectors and Watchmakers

The Certina 25-451 is a robust Swiss automatic movement used primarily in the mid-20th century, especially within Certina’s Ocean Star collection. Known for its precision and reliability, it features 21 jewels, operates at 18,000 vibrations per hour, and has a power reserve of approximately 40 hours. This calibre includes a sweep second and date function, with the date set by changing the time within 23-24 hours.
Key Technical Specifications

Movement Type: Automatic mechanical

Calibre: Certina 25-451

Size: 11.5 lignes (approx. 25.6 mm diameter)

Height: About 6.5 mm

Jewels: 21 synthetic jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Around 40 hours

Functions: Automatic winding, sweep seconds, date (non-quickset)

Common Spare Parts

Balance Assembly: Balance wheel, staff, hairspring, regulator crucial for accurate timekeeping.

Mainspring: Correctly sized for reliable power delivery and long service life.

Escape Wheel & Pallet Fork: Core escapement components regulating movement speed.

Gear Train Parts: Center, third, and fourth wheels necessary for smooth energy transmission.

Date Mechanism: Date disc and intermediate wheels for the calendar function.

Setting and Winding Components: Stem, crown, clutch wheel, setting lever, springs for functional winding

Certina 25-451 Watch Spare Parts: Detailed Guide for Collectors and Repair Professionals

The Certina 25-451 is a renowned Swiss automatic mechanical movement designed primarily for the Codiver and Ocean Star collections between 1951 and 1960. This calibre features a robust build, reliability, and a classic automatic winding system coupled with a date function that requires setting by adjusting the time between 23:00 and 24:00. It operates at a beat rate of 18,000 vibrations per hour and carries 21 jewels, offering a power reserve of about 40 hours.
Key Technical Specifications

Movement Type: Automatic mechanical

Calibre: Certina 25-451

Size: 11.5 lignes (approximately 25.6 mm diameter)

Height: Around 6.5 mm

Jewels: 21 synthetic jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: About 40 hours

Functions: Sweep seconds, automatic winding, date (non-quickset)

Common Spare Parts

Balance Assembly: Balance wheel, hairspring, staff, and regulator essential for precise timekeeping.

Mainspring: Properly sized for enduring power delivery and performance.

Escape Wheel & Pallet Fork: Core escapement components regulating the movement’s accuracy.

Gear Train Wheels: Center, third, and fourth wheels that ensure smooth power transmission.

Date Mechanism: Date disc and intermediate wheels for the calendar function operation.

Setting and Winding Components: Stem, crown, clutch wheel, setting lever, springs enabling manual winding and setting.

Oscillating Weight: Integral part of the automatic self-winding system.

Plates, Bridges & Screws: Support structural integrity and component mounting.

Jewels: Synthetic rubies to reduce friction and wear, enhancing longevity.

Hands & Dial Components: Vintage-compatible parts preserving original aesthetics.

Maintenance and Sourcing Tips

Verify the calibre “25-451” marking before sourcing parts to ensure compatibility.

Favor New Old Stock (NOS) or genuine donor parts for best fit and authentic restoration.

Handle escapement, date, and winding components carefully during repairs.

Use lubricants designed for vintage automatic Swiss movements.

Specialist suppliers and vintage watch dealers regularly stock these components.

Importance of Genuine Spare Parts

Ensures long-lasting accuracy, durability, and reliable operation.

Preserves the historical integrity and collector value of your vintage Certina timepiece.

Supports professional restoration for watch longevity and performance.

Using authentic parts guarantees your Certina 25-451 maintains its heritage of Swiss precision and craftsmanship.

 

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Stem, Crown, Hands & Spares might be available for this movement.

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