Dansk SM-Lampen No. 4074 WWII Blackout Light Bulb

Beskrivelse

A rare Danish WWII-era blackout light bulb (Mørkelægningslampe) by SM-Lampen, model No. 4074. The bulb features a black opaque coating with a small blue filter at the tip for restricted light emission. It is accompanied by its original red and grey graphic box and a printed instruction leaflet in Danish. The bulb base is stamped with the model number and brand logo.