Dewch i brocio'r cof yng nghwmni John Hardy, wrth i ni edrych ar y lliw glas. John Hardy heads back to the bygone years.
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Dewch i brocio'r cof yng nghwmni John Hardy, wrth i ni edrych ar y lliw glas. John Hardy heads back to the bygone years.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
