Gwasanaethau ffôn a phost/Telephone and postal services Add to clipboard P1/57 File 1974-1978 Part of Papurau Gwynfor Evans/Gwynfor Evans Papers,
Swyddfa Bost a Theleffon/Post Office and Telephone service Add to clipboard P1/73 File 1978-1979 Part of Papurau Gwynfor Evans/Gwynfor Evans Papers, Great Britain. Post Office