Wynne "Infallible" exposure meter
1913
1913
circa 1910
circa 1960
1935
1900
1895
1926
1953
1938
1920
1936
1952
1908
1935
1887
1927
1888-1895
1970-1979
1959
1955
1930-1940
1950-1959
1940-1959
1895-1905
circa 1910
circa 1934
circa 1954
circa 1910
1908
1936
1972
1933
1933