Cartier mechanical watch is not accurate.

Cartier mechanical watches are timeless pieces of art, but unfortunately, they are not always the most accurate. This means that when it comes to telling time, these watches may not always be on target. Here are some reasons why:

1. Mechanical Movement: Most Cartier mechanical watches have an automatic or manual-wind movement. While these mechanisms are reliable and quite accurate, they are also prone to slight variations in accuracy due to extreme temperatures, vibrations and other factors.

2. Inaccurate Regulator: Poorly adjusted regulators can cause the rate of a mechanical watch to deviate from normal parameters. If the mechanical watch is not adjusted periodically, the results may be less than perfect.

3. Age: As a mechanical watch begins to age, certain components may start to malfunction. This can lead to a change in the timekeeping accuracy of the watch.

4. Wear and Tear: Mechanical watches are complex pieces of machinery that require regular cleaning, lubrication, and maintenance. If these are not completed, the timekeeping accuracy of the watch can suffer due to wear and tear.

When it comes to choosing a mechanical watch, accuracy should be taken into consideration. Though not always the most accurate, Cartier mechanical watches offer plenty of beauty and elegance that makes them a great option for many.