The Tissot caliber 6922 is a manual-winding mechanical chronograph movement from the 1970s, developed as part of Tissot’s chronograph lineup based on the proven Lemania 1872/1873 platform. This caliber, like the closely related 6942 and 6952, was built during the era when Tissot operated under the SSIH group alongside Omega. Known for its durability, straightforward construction, and reliable chronograph function, the 6922 continues to be appreciated by collectors and enthusiasts of vintage mechanical watches. Proper maintenance is essential to keep the movement running accurately and to preserve its mechanical integrity.

Overview of the Tissot 6922

The Tissot 6922 is a bicompax chronograph movement, meaning it typically features two subdials: a 30-minute counter at 3 o’clock and running seconds at 9 o’clock. It also includes a central chronograph seconds hand. The movement is manually wound, requiring the wearer to wind it daily for optimal performance.

The 6922-powered watches were often housed in stainless steel cases with sporty or racing-style designs, large chronograph pushers, and colorful dial accents. These models remain popular on the vintage market for their style and mechanical reliability.

Service Intervals

Like all vintage mechanical chronographs, the Tissot 6922 should be serviced every 4 to 6 years. Even if the watch is functioning, dried lubricants and microscopic dirt can cause excessive wear on moving parts. Chronograph movements have many more interacting components than standard three-hand watches, and they are more vulnerable to damage from neglect.

Early servicing is recommended if you notice:

• Irregular timekeeping

• Chronograph seconds hand skipping

• Reset not aligning to zero

• Stiff or stuck pushers

• Unusual noises during winding or operation

What a Full Service Involves

Servicing the 6922 should be performed by a qualified watchmaker with experience in vintage chronographs. A proper full service includes:

1. Disassembly: The movement is completely dismantled, including the chronograph mechanism.

2. Cleaning: Each component is cleaned in a professional ultrasonic machine to remove old oils and contaminants.

3. Inspection: Key parts like the clutch, reset hammers, and balance assembly are examined for wear.

4. Part replacement: Worn or damaged components are replaced with original or compatible parts.

5. Lubrication: Modern watch oils and greases are used at specific friction points.

6. Reassembly and testing: The movement is carefully reassembled, the chronograph is adjusted, and the watch is tested for amplitude, beat error, and positional accuracy.

7. Water resistance (optional): Pushers, caseback, and crown gaskets can be replaced if original water resistance needs to be restored (note that many vintage watches were not highly water-resistant to begin with).

Common Areas of Wear

Even with solid engineering, certain components of the 6922 require attention over time:

• Chronograph reset hammer and heart cam can wear down, causing improper reset alignment.

• Clutch mechanism may slip or fail if lubrication has dried out.

• Pushers and gaskets degrade, making them stiff or loose.

• Balance assembly and escapement need regular oiling and adjustment for stable timekeeping.

• Mainspring barrel may lose its torque after years of use.

Best Practices for Longevity

To help preserve the movement and avoid unnecessary damage:

• Never reset the chronograph while it is running. Always stop it first.

• Wind gently and consistently once per day. Avoid over-winding.

• Do not expose to moisture or magnetism. These can severely impact performance and accuracy.

• Store in a stable, dry environment when not in use, ideally in a watch box or case.

Conclusion

The Tissot 6922 is a robust, reliable vintage chronograph movement built during a golden era of mechanical watchmaking. With its Lemania heritage and straightforward construction, it remains highly serviceable and dependable for everyday use or collecting. Regular maintenance, careful use, and periodic professional servicing will ensure this classic movement continues to function smoothly and accurately for many years to come. For those who appreciate vintage chronographs with mechanical charm, the 6922 remains a strong and enduring choice.