Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Angular gauge
Flat 11inch straight rule with pivoted end from which graduated angular suspended.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Flat 11inch straight rule with pivoted end from which graduated angular suspended.