
Spiralarm miners safety lamp and methane detector, made by J H Naylor Ltd, c. 1960
1960
1960
c.1850
1954-10-21
1860-1870
1940-1960
1755-1765
1950-1970
1967-12
1968-04-05
1957-04-02
1992
1970
1902-1949
1982
circa 1948
-1882
1861-1880
1861-1880
1861-1880
circa 1960
2001-02-14
1896
circa 1984
1861-1880
2000-08-09
1980-1988