Experimental Form 1 (Licence to use Wireless Telegraph), 1905
1905
1905
2005
1946
circa 2014
1864
2021
1933
circa 2014
1946
1890-1922
circa 2014
unknown
1924
1869
circa 2014
1886
1924
1908
1897
1869
1906
1944
1924
1855
1869
1875
1940-1949
1913
1914