Physical description

Cast, assembled, moulded. Coated. Accessories: plastic dials and base. Surface finish: enameled, coated.

Inscriptions & markings

Plaque: “GALVANOMETER/TYPE 4500A/NO. 33871/H. TINSLEY & CO./ LONDON S.E. 25” Label under the plaque: “NA[illegible]HIL LAB”