
Amplion loud speaker with wooden horn, 1925
1925
1925
1920-1930
1931
1920
1943
1921-1931
1937-1937
1913
1914-1918
1914-1918
1925-1935
1937-1938
1937-1938
1925-1940
1925
1928
1919
1931
1915
1915
1932-1942
1911
1938
1920
1938
1938
1910-1920
1938
1940
1928
1932
1938
1924
1938
1936
1921-1930
1927
1940
c.1912
1910
1935
1936
1945
1925-1928
1910-1940
1940
1915-1917
1935-1945
1916
1932-1936