
Roller bearing type N.L. 30; 1921 branded Norma
1921
1921
1956
1903
1898
1917
1935
1920
1800-1850
1935
1923
1956
1925
1956
1909
1787 Date of patent
1898
1920-1926
1901
1895-1898
1920
1920
1931
1925
1937
1898
1910-1920
1920
1910
circa 1937
1920
1935
1922
1934
1892-1906