Vintage Info – All About Vintage Lighting

Cosack Swing-Arm Wall Lamp

Materials: Brass, off-white/beige painted lampshade. Painted with wrinkle-paint, white painted inside. Some metal parts, Metal socket. 

Arm: 100 cm / 39.37”

Height: 28 cm / 11.02”

Width: ∅ 31 cm / 12.20”

Electricity: 1 bulb E27, 1 x 75 watt maximum, 110/220 volt.
Any type of light bulb can be used, not a specific one preferred.

Period: 1950s and 1960s – Mid-Century Modern.

Designer: To be appraised.

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

Other versions: Made in several colours. A version with a different arm was also made, as you can see below. The lampshade was also used for a pendant lamp and a table lamp.

Often attributed to Louis Kalff, but that is not trueLouis Kalff designed several lamps with a similar lampshade for Koninklijke Philips, the company he worked for all his life, but that’s all.


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 company 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: Wilhelm WagenfeldUrsula StürzenhofeckerK. H. Kinsky.

Gebrüder Cosack (Gecos) received 15 iF Design Awards


Links (external links open in a new window)

If Design Awards for Gebrüder Cosack

Cosack lamps on Vintageinfo

Gebruder Cosack Wall Lamp

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