https://museum.wales/collections/online/object/02c98136-67f1-3948-b065-4757c41bb086/?field0=with_images&value0=on&field1=string&value1=working%20mens%20institute&field2=string&value2=building&index=9
Deep Navigation Colliery, lamp check - Collections Online | Museum Wales
Deep Navigation Colliery oval brass lamp check.
deep navigation collieryonline museumlampcheckcollections