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Amgueddfa Cymru – Museum Wales
City & Guilds of London Institute Colliery Mechanic's Advanced Certificate held in 1965. Issued to Granville David Thomas who "attended a Course of Instruction at Technical College of Monmouthshire, Crosskeys passed in the year 1965 the Examination for the Colliery Mechanic's Advanced Certificate." Black print on cream paper within red border. Details typed in black.
