Physical description

Machined metal parts, polymer base, wooden box plinth. Uncoated metal, polished wood. Surface finish: wood varnish.

Inscriptions & markings

[Stamped] on upper face, centre of front edge: Hartmann & Braun A.G./ Frankfurt a.M/ No 13881. [Stamped] on upper face, centre of back edge: Manufacturer’s symbol. Paint dot on upper face in top left corner approx. 0.7-1.0cm in diameter.