Gruen | PrecisionGruen, founded in 1894 in Cincinnati, Ohio by German born watchmaker Dietrich Gruen, was once among the largest and most innovative American watch manufacturers. The company played a key role in popularizing wristwatches in the United States and was renowned for its technical advancements, including the introduction of the thin VeriThin movement and the iconic Curvex design. Gruens Precision line, trademarked by the brand, was a hallmark of their