Radio valve, box. Glass radio valve, metal pins. Glued printed label. Wrapping of corrugated cardboard, tissue. Printed box.
Collection William R. Morris, 1st Viscount Nuffield, by bequest to Nuffield College, University of Oxford, 1963, by transfer to National Trust, Nuffield Place, 2011.
Marks and inscriptions
printed ; on valve ; B319\FOREIGN MADE.\SUPPLIED FOR MARCONI PHONE CO. LTD. BY MULLARD.\B.V.A. ; ;