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
Green covered booklet with black print. Full Title - Working Models for Engineereing Students. Notes on Slide Valve Models, 6th Edition. Dated January, 1920 with the following names on cover - T. Jones and T.G. Jones. 27 page booklet with 10 b & w drawn images of slide valves and 3 additional pages at rear advertising other models.
