Ferranti valve, type V.H.T.4, black on red printed label, pinch marked 343, top cap loose, (RMW/Y107 - McVitie Weston number), by Ferranti Limited, 1935.
Ferranti valve, type V.H.T.4, black on red printed label, pinch marked 343, top cap loose, (RMW/Y107 - McVitie Weston number), by Ferranti Limited, 1935.