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