Large junghans wall stopwatch for darkroom / mechanical laboratory timer 1960

Large junghans mechanical wall-mounted chronograph / stopwatch / timer in metal for darkroom or laboratory, industrial style, dating from the 1950s. Mechanical winding, with side start-stop button. Original green paint, chipped. Double dial 10 minutes and 60 seconds, two hands, phosphorescent graduations, protective glass in good condition. Diameter 21 cm, depth 7 cm. In operating condition. Rare model!.