Clas Thunberg
| full name | Arnold Clas Robert Thunberg | |
| nationality | Finland (FIN) | |
| born | April 1893 | in Helsinki (Finland) |
| died | April 1973 | in Helsinki (Finland) |
| Navigation | Championships | World Records |
World records
| # | discipline | record | date | place | ||
| 1 | 500 meters | 0:42.8 | 19 Jan 1929 | Davos | SUI | |
| 2 | 1000 meters | 1:28.4 | 11 Jan 1930 | Davos | SUI | |
| 3 | 500 meters | 0:42.6 | 13 Jan 1931 | St. Moritz | SUI | |
| 4 | 3000 meters | 5:19.2 | 8 Jan 1932 | Davos | SUI | |
