Silent film drama depicts effect on everyone as color blindness becomes a concern due to "railroad improvements", the color light block signal. AKA: The Block Signal Sinal de Perigo
1925
1952
1955
1958
1941
1926
1951
1926
1926
1928
1925
1959
1919
1973
1916
1925
1943
1995
1964
1920
1926
1920
1926
1926
1936
1963
1926
راه غرب
1967
01921
1924
1926
2018
1934
1926
1939
1916
1918
1960
1926
Ride the Wind
1966
1925
1952
1955
1958
1941
1926
1951
1926
1926
1928
1925
1959
1919
1973
1916
1925
1943
1995
1964
1920
1926
1920
1926
1926
1936
1963
1926
راه غرب
1967
01921
1924
1926
2018
1934
1926
1939
1916
1918
1960
1926
Ride the Wind
1966
