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Cosack Cone Desk Lamp

Materials: White painetd cast iron base. Painted with texture paint. Curved brass rod, joint and parts. Adjustable pale yellow painted folded conical aluminium lampshade. Brass E27 socket.

Lampshade: ∅ 12 x 23 cm / 4.72 x 9.05”

Height: 32 cm / 12.59”

Base: 15 cm / 5.90”

Electricity: 1 bulb E27, 1 x 60 watt maximum, 110/220 volt.
Any type of light bulb can be used, not a specific one preferred.

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

Designer: To be appraised.

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

Other versions: This Cosack cone desk lamp exists in several colours. Many different lampshades were used for lamps with the same base. In Germany these lamps are named Tütenschirm lamps: cone screen.


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

Gebrüder Cosack (Gecos) received 15 iF Design Awards


This lamp has a cast iron base made by Erwi. Erwi was a cast iron producer, not a lamp producer. The company made cast iron counterweights for several lighting companies. Erwi produced many items in cast iron, for instance also Christmas tree stands. In all probability a German company. The company no longer exists.

At least Kaiser Leuchten and Cosack Leuchten, both from Germany, used cast iron from Erwi for their lamps.