Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Slide rule
Wooden slide rule belonging to William Mitchell, Secretary of Penarth Pontoon Slipway & Ship Repairing Co.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Wooden slide rule belonging to William Mitchell, Secretary of Penarth Pontoon Slipway & Ship Repairing Co.