These cookies are absolutely essential for our website to function properly.
We use Google Analytics to measure how you use the website so we can improve it based on user needs.
These cookies may be set by third party websites and do things like measure how you view YouTube videos.
Amgueddfa Cymru – Museum Wales
Full title - Winstone Mine. Blaenavon. Scale 1/500. Plan Showing Proposed Connection Surface to Underground for Return Airway. Plan Prepared March 1988. Operation Completed 21:10:1988.
