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
Hand drawn in black ink on grey paper. A technical drawing showing cast iron steel blocks at Richard Thomas & Co. Ltd. Abercarn. Dated 16/10/37 and signed 'T.N.B' in bottom right hand corner.
