Series One (1927 - 1938)
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Series Two (1931 - 1940)
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Series Three (1931 - 1949)
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Series Four (1932 - 1934)
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Series Five (1932 - 1937)
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Series Six (1933 - 1949)
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Series Seven (1935 - 1940)
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Series Eight (1959 - 1960)
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Series Nine (1960 - 1963)
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Series Ten (1961 - 1970)
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Series Eleven (1966 - 1969)
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Series Twelve (1969 - 1970)
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Series Thirteen (1969 - 1970)
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Series Fourteen (1971 - 1072)
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