Vintage Info – All About Vintage Lighting

Cosack Broken Glass Wall Lamp

Materials: Gold painted metal frame, broken glass on a glass plate. Metal socket

Height: 13 cm / 11.02”

Width: 23 cm / 12.20”

Electricity: 1 bulb E14, 1 x 40 watt maximum, 110/220 volt.
Any type of light bulb can be used, not a specific one preferred.

Period: 1960s – Brutalist, Mid-Century Modern.

Designer: To be appraised.

Manufacturer: Gebrüder Cosack – Gecos, Neheim-Hüsten, Germany.

Other versions: This Cosack broken glass wall lamp was made in several colours and sizes.

Probably inspired by a design by Willem van Oyen Sr. for Raak Amsterdam: the Chartres wall lamp. Several light companies in Europe produced their version of the Chartres lamps.


The Gebrüder Cosack (Gecoscompany was founded in 1848 as a metal processing plant in Neheim-HüstenGermany by Egon, Friedrich and Theodor Cosack. In the beginning they made liturgical items and crosses made of brass and they also produced kerosene lamps. Later the firm came to the production of electric lamps.

After the Second World War Cosack pursued a modern direction. A best seller were copper lighting for restaurants. The company was declared bankrupt in 1984.

Best known designers: Ursula or Gottfried Stürzenhofecker (unclear, they are both designers), K. H. Kinsky.

Gebrüder Cosack (Gecos) received 15 iF Design Awards

Many thanks to Hans from Objeta for the beautiful pictures and the enthusiasm.