
McVitie Weston valve collection, Telefunken valve, type EF13
1948
1948
1948
1940
1948
1939
1933
1937
1948
1940
1935
1934
1949
1939
1934
1931
1940
circa 1938
1946
1934
1934
circa 1934
1945
2000-800
1937
1934
1931
1937
1935
1932
1934
1934
circa 1950
1940
1932
1933
1937
1933
1935
1935
1933
1938
1934
circa 1931
1937
1934
circa 1935
1943
1934
1938
1948