Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Annealing pans, technical drawing
Hand drawn in black ink on grey paper. A technical drawing showing annealing pans with cambered sides and concave bottom. Dated January 24th, 1925 and signed 'T.N.B.'
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.