Large Original Soviet Metal Industrial Sign — USSR, 1960s–1970s — Refrigerator Maintenance — 40 × 52 cm An unusual and impressive original Soviet industrial metal sign from the 1960s–1970s, featuring authentic USSR technical graphics and bold Cyrillic lettering. Made of solid metal, this large sign was intended for use in Soviet workplaces and industrial refrigeration facilities. Original Russian inscription: “Keep the refrigerator clean and remove frost regularly. The ice layer must not exceed 3 mm!” Even Soviet Refrigerators Had Strict Rules! In the Soviet Union, even refrigerators had to follow strict regulations! Apparently, eating everything inside was not enough — you also had to keep the ice under control! A charming reminder of everyday Soviet industrial life. Details * Origin: USSR * Period: Approximately 1960s–1970s * Material: Metal * Dimensions: Approximately 40 × 52 cm * Condition: Original vintage condition, with natural signs of age, scratches, patina and some rust, especially along the edges. The original lettering and illustrations remain clearly visible. A distinctive piece of Soviet industrial history — perfect for collectors of USSR memorabilia, vintage metal signs and industrial décor.