
Watson varifocal zoom lens model 75/6.7, 1948
1948
1948
1947-1948
1947
1934-1940
1935
1935-1936
1934-1940
1936-1948
1932-1933
1946-1948
1935
1936
1942
1935
1942-1945
1944
1937-1938
4000-2001 BCE
circa 1947
1936
1943-1945
circa 1939
1934-1944
1938
1947
1933
1903 (original); 1982 (model)
circa 1945
1938
1945-1946
1934
Before 1932
1943
1942-1945
1937
1938
1948
1936
1990-95
1945
1938
1834-1836
1944
1938
circa 1932
1932-1941
1947
1935
1936
1933-1934