Clockwork timer for operating an external lever (to control gas or electricity supply)
1939-1949
1939-1949
1980-1984
1904-1910
1940-1980
1940-1974
1970-1984
1930-1960
1940-1974
1997-1999
1968
1960-1975
1968
2020-2021
1968
circa 1904
patented 1908
1970-1979
1920-1930
1899
1897
1903-1913
1950-1969
circa 1955
1920-1930