Vintage Polish Enamel Warning Sign — "Uwaga! Wysokie Napięcie" — High Voltage — Skull & Lightning Bolt — PRL A striking and highly collectible vintage Polish enamel warning sign reading "Uwaga! Wysokie Napięcie" (Warning! High Voltage), featuring a bold graphic of a skull and crossbones overlaid with a red lightning bolt. A classic piece of PRL-era industrial graphic design — visually powerful and instantly iconic. Text: "Uwaga! Wysokie Napięcie" — Warning! High Voltage Graphic: Skull and crossbones with red lightning bolt Material: Vitreous enamel on steel Colour: White background, black skull and text, red/brown lightning bolt Mounting: Four corner holes for wall/post fixing Style: Industrial / warning / graphic / PRL Condition: Good vintage condition — enamel intact with minor edge chipping and light wear consistent with age and outdoor use Origin: Poland (PRL) Period: 1950s–1970s A bold and eye-catching display piece — perfect for industrial interiors, workshops, garages, bars, or as a graphic collectible for lovers of vintage signage and PRL design. This item will be sent via registered and tracked courier.