unique c. 1950's american industrial single-sided stamped metal rectangular-shaped upright cautionary sign fabricated by or for mulrain rental, bayside, ny. the vintage roadside sign is comprised of heavy gauge steel with white and black stripes containing a light-sensitive or reflective surface. the stripes indicate solid objects such as barricades or bridge abutments found near the roadway. surface wear and rust discoloration evident. measures 30 x 12 inches.