1950 Swiss mechanical watches Gruen

Each watch Jieke normal use, we ask the master clocks 40 years of experience to help detect, Condition are good and functioning properly. 1950s' century Swiss mechanical watch brand Gruen chain 24-30 hours of continuous use Recommendations on the chain every day Gruen watch brand founded in 1894 to 1958 Antique table market, collectors have been acquired Origin / manufacturing methods Switzerland