Clas Thunberg (1893–1973) won a total of five Olympic gold medals, one silver and one bronze in speed skating at the Olympic Winter Games of 1924 and 1928. His skates were made by the Norwegian manufacturer L.H. Hagen & CO. Thunberg is known to have used the same pair all through his career, as was customary for speed skaters at the time. The blades were probably changed over the years. The skates are patched with metal plates, which shows how highly Thunberg appreciated the pair. The skates are of size 41.