Heyde's Aktinophotometer Optical Exposure Meter

Heyde's Aktinophotometer optical exposure meter with case. The Aktinophotometer optical exposure meter is disc-shaped and has a small protruding bowl-shaped part above the item description, which has a decorative top border.

The case is made of light brown cardboard and has the item description embossed, inside an eight-pointed star shape with a decorative border, on the lid which detaches.