
Timeswitch to control a meter which charged daytime and night-time consumption at different rates
1903
1903
1890-1920
1965
1965
1801-1892 (prepared); 1926 (element removed)
1810
1701-1730
1701-1730
1998
1801-1900
1880-1920
1801-1900
1950-1970
1961-01-19
1958-1960
1949
1816
circa 1877-1965
1901-1950
1810-1850
1790-1819
1790-1819
1790-1819
1872-1879
1880
1909-1914
1909-1914
1946
1850-1900
1771-1880
1871-1920
1900-1931
1850-1920
1810-1850
1975-1985
circa 1960
circa 1960
1780-1820
1701-1800
1899-1909
1850-1920
1897-1898
2017
1801-1900