Small measuring instrument with chain

The small measuring instrument has a light-coloured plastic body with a circular control, numbered scale and metal chain. A narrow rectangular display is visible on top, with a row of small openings or buttons on the front. The surface is scuffed and dirty in places.

Code: fo10314
Category: Photo, microscopes, optics
Subcategory: Darkroom
Width: 6 cm
Period: 1950s, 1960s
Material: Plastic, Metal
Colour: White, Brown, Gold