vintage american freestanding double-sided "men working in trees" cautionary sign and bracket manufactured for the american bell telephone company. the collapsible four-legged stand is comprised of reinforced galvanized steel. the timeworn die cut sign contains bold black lettering against a yellow enameled background. the sign itself, was fabricated by or for the asplundh tree company. the sign bracket is flanked by two welded joint cylindrical rods used for supporting red cautionary flags. the asplundh tree expert co. is a utility contractor specializing in tree pruning and vegetation management. the company also does utility construction, traffic signal and highway lighting construction and maintenance, automated metering infrastructure, home energy management program implementation and vegetation control for railroads and pipelines. asplundh was established in 1928, the first company to specialize in power line clearance and vegetation management instead of residential services. asplundh specializes in trimming trees around power lines and telephone lines. in 1940, the first issue of the asplundh tree was issued to crews. by this time the company had expanded from pennsylvania to the midwest and the middle atlantic states. in 1956, a subsidiary company, asplundh brush control co was established.