Dietrich Gruen was president Of Columbus 1874-94. Age 21-41 before organizing Gruen watch business. I never kept any old Columbus watches and had some good ones. As a recent Gruen collector recently bought an 1888 16 size with odd regulator and a very good 1894 Railway King. These are both Gruen designs not the Aeby Swiss movements used by Gruen in early Columbus watches. Columbus was a small volume producer. 1888 10 per day made. 1894 serial number only 230,000. Lever setting moves sideways clockwise to set. Not sure later ones do.