Focusing device in its box

The black focusing device has a rectangular plastic body with a front optical window and is placed beside a cardboard box. The box is marked ZAOSTŘOVACÍ ZAŘÍZENÍ, with a handwritten notation also visible. The plastic body is scuffed, while the cardboard box is dirty and worn along the edges.

Code: fo10028
Category: Photo, microscopes, optics
Subcategory: Darkroom
Width: 16 cm
Quantity: 2 pcs
Period: 1970s, 1980s
Material: Plastic, Paper
Colour: Black, Brown