Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Deep Duffryn Colliery, lamp check
Circular disc with 2mm rim, outer circle with maker's name and address, inner circle with number near centre, hole punched through top/centre of outer inscribed circle
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.