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Amgueddfa Cymru – Museum Wales
National Welsh Slate Quarries Limited, £1 participating preference shares, 1920, black on white. * Black print on white paper with handwritten details completed in black ink. Ornate border on left only. Embossed company seal on lower left hand corner. 100 £1 shares numbered 85572 to 85671. Certificate number '313'. Dated 6 September 1920.
