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26 October 1958–3 March 1968
(as a TV production company from 26 October 1956 to 13 January 1958 / as a TV channel since 14 January 1958)
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Teledu Cymru (TV block)
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6 June 1961–26 January 1964
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4 March–19 May 1968
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20 May 1968–5 April 1970
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6 April 1970–27 September 1987
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28 September 1987–31 August 1989
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1 September 1989–31 December 1992
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1 January 1993–1 January 1995
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2 January 1995–31 December 1996
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15 January 1997–3 October 1998
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4 October–15 November 1998
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15–28 November 1998
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29 November 1998–7 March 1999
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8 March–31 May 1999
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1 June–7 November 1999
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8 November 1999–31 December 2000
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1 January–1 July 2001
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2 July–10 August 2001
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11 August 2001–27 October 2002
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28 October 2002–31 August 2003
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1 September 2003–31 October 2004
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1 November 2004–15 January 2006
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16 January–12 November 2006
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13 November 2006–8 April 2010
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9 April 2010–13 January 2013
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14 January 2013–present
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