Experimental Form 1 (Licence to use Wireless Telegraph), 1905
1905
1905
2005
1855
1913
1850-1859
2021
1906
1906
1875
1890-1922
1944
1946
1869
1943
1869
2009
1914
1897
1908
1933
1924
1946
1924
unknown
circa 2014
1954
1912-1913
1864
1875
1942