The Tissot caliber 43 is a manual-winding mechanical movement produced in the mid-20th century, primarily during the 1940s and 1950s. It was one of Tissot’s earlier in-house calibers, designed to power a wide range of elegant dress watches and classic time-only wristwatches. Known for its simple architecture, reliability, and ease of servicing, the caliber 43 remains a symbol of Tissot’s dedication to Swiss watchmaking craftsmanship during the post-war era.

Overview of the Caliber 43

This movement reflects the design priorities of its time: durability, legibility, and ease of manufacturing. The caliber 43 typically featured a central hour and minute hand, with or without a small seconds subdial depending on the version and watch configuration.

It was often found in round stainless steel or gold-plated cases, ranging in diameter from 32 mm to 36 mm, making it suitable for both men's and unisex watches. Tissot used this movement across several references sold in both European and North American markets.

Technical Specifications

• Type: Manual-wind mechanical movement

• Functions: Hours, minutes, and small seconds (in most configurations)

• Jewels: Typically 15

• Frequency: 18,000 vibrations per hour (2.5 Hz)

• Power reserve: Approximately 40 hours

• Diameter: Around 27 mm

• Shock protection: Early models had none; later examples may include basic protection systems

• Finishing: Functional and clean, with matte or brushed bridges and simple decoration

The movement used a traditional Swiss lever escapement and was built with a focus on robustness and long-term serviceability.

Maintenance Guidelines

Due to the movement’s age, regular servicing is crucial to maintain accuracy and prevent wear. Recommended service intervals are every 4 to 6 years, or sooner if the watch shows signs of distress.

A proper service should include:

1. Disassembly of the entire movement

2. Ultrasonic cleaning of all parts

3. Inspection for wear or corrosion, especially in the mainspring barrel and gear train

4. Replacement of worn components if available or using donor parts

5. Lubrication using modern synthetic oils

6. Timing regulation and adjustment in multiple positions

7. Case resealing if gaskets are present (though most watches from this era are not water-resistant)

Because these watches are often over 60 years old, some components (like crown stems or balance pivots) may require custom restoration or hand-fitting.

Handling and Preservation Tips

• Avoid water exposure: These vintage watches are not water-resistant unless recently resealed, and even then, only minimally so.

• Wind gently and consistently: Daily winding is safe but stop as soon as you feel resistance.

• Keep away from magnetic fields: Vintage balances are not protected against magnetism.

• Store in a dry, stable environment: Avoid extreme temperatures and humidity.

• Use only when clean and serviced: Running an unserviced vintage movement can cause irreversible damage over time.

Collectibility

The Tissot caliber 43 is not a high-end collector's movement, but it holds historical value and charm for enthusiasts who appreciate vintage Swiss craftsmanship. Watches using this caliber are often affordable, well-proportioned, and mechanically satisfying, making them a solid entry point for vintage watch collectors.

Conclusion

The Tissot caliber 43 is a fine example of mid-century Swiss mechanical watchmaking. With its straightforward construction and sturdy design, it served as the foundation for many of Tissot’s successful post-war models. Properly maintained, this movement can continue to offer accurate and charming performance for decades. For lovers of vintage dress watches or historical horology, the caliber 43 is a timeless and practical piece of Tissot's legacy.