Experimental Form 1 (Licence to use Wireless Telegraph), 1905
1905
1905
2005
1946
2021
1864
circa 2014
1890-1922
1933
1946
1924
circa 2014
circa 2014
1897
1869
unknown
1940-1949
1924
1869
1886
circa 2014
1913
1908
1869
1924
1944
1906
1855
1869
1875