
BBC printing stamp issued to the Willesden Wireless Company
1922-1924
1922-1924
Before 1932
1903
1913-1923
1903
circa 1905
1668; 1924
1905
1902
1990-95
1902; 1913-1920
1901-1930
1897
1610; 1923
1903
1919
1903
1910
before 1930
1925-1926
1910-1920
1915-1918
1903
1925; 1862
1919
1899
1912
1930
1936
1934
1909
1900-1933 (model); 1869 (original)
1908
1930s
1909-1914
1901-1930
1917
1912
1907
1929
1927
1917
1933
1920-1930
1921
1928
1926
1923
1899
1926