Top 10 Swiss Watch Companies by Chronometer Certifications

The Federation of the Swiss Watchmaking Industry (FHS) recently reported that chronometer certifications--a key measure of mechanical timekeeping accuracy--were up 10.7 percent in 2006. Once again, Rolex had the lion's share of the market with more than 50 percent of the 1.3 million certificates issued. Here's how the top 10 breakdown:

1. Rolex - 710,752
2. Omega - 257,187
3. Breitling - 182, 223
4. Panerai - 46,454
5. Chopard - 23,462
6. Ulysse Nardin - 10,111
7. Corum - 8,189
8. TAG-Heuer - 7,450
9. Chanel - 6,980
10. Mido - 5,722