Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Indicator
Richards Improved Patent steam engine indicator in mahogany case.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Richards Improved Patent steam engine indicator in mahogany case.