| Serial Number | Year |
|---|---|
| 100 | 1840 |
| 1’200 | 1845 |
| 3’000 | 1850 |
| 8’000 | 1855 |
| 15’000 | 1860 |
| 22’000 | 1865 |
| 35’000 | 1870 |
| 45’000 | 1875 |
| 55’000 | 1880 |
| 70’000 | 1885 |
| 85’000 | 1890 |
| 100’000 | 1895 |
| 110’000 | 1900 |
| 125’000 | 1905 |
| 150’000 | 1910 |
| 175’000 | 1915 |
| 190’000 | 1920 |
| 200’000 | 1925 |
| 820’000 | 1930 |
| 824’000 | 1935 |
| 835’000 | 1940 |
| 850’000 | 1945 |
| 860’000 | 1950 |
| 870’000 | 1955 |
| 880’000 | 1960 |
| 890’000 | 1965 |
| 895’000 | 1970 |
| 930’000 | 1975 |
| 1’100’000 | 1980 |
| 1’350’000 | 1985 |
| 1’450’000 | 1990 |
Dating Patek Philippe watches using serial numbers
