McVitie Weston valve collection, Griffin valve
Griffin valve, mounted in ebonite box 1.75in square x 0.75in thick with broken swivelling lid, (RMW/P19 - McVitie Weston number), by Griffin-Smith Manufacturing Company.
Griffin valve, mounted in ebonite box 1.75in square x 0.75in thick with broken swivelling lid, (RMW/P19 - McVitie Weston number), by Griffin-Smith Manufacturing Company.