Sign IIA-20: “Stop! Customs”. Based on reference drawing in Instrukcja o znakach i sygnałach na drogach (English translation: Instruction about traffic signs and signals), made by Ministry of Communication and released in Warsaw in 1975 by Wydawnictwa Komunikacji i Łączności. This version of the sign was used on border crossings located on Poland–Soviet Union border.
Own work
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