National Geographic : 1925 Oct
isshape does more than add distinctiveness to a man's pocket watck Truly a most distinctive watch, the Gruen Pentagon, with its five rounded sides. Yet distinctiveness is not the only advantage this exclusive shape has to offer in a man's pocket watch. The Pentagon shape, patented by the Gruen Guild, has a direct bearing on the accuracy of the movement it encloses. Every good watch, of whatever make, is subject to a slight variation in timekeeping per formance as it changes position. It must be thoroughly adjusted by a series of compensa tions before it leaves the watchmaker's hands. By keeping the watch at all times upright in the pocket, the Pentagon simplifies this prob lem of adjustment, thus becoming an important aid to the service the watch will give its owner. The Pentagon, which has proved the most popular case design in Gruen watches for men, is now for the first time available with an "Ultra-VeriThin" Precision movement. The result is a watch of rare grace and a timekeeper of unusual dependability, at a price hitherto unheard of for a watch of this thin ness and character. The better jewelers can show you the com plete Pentagon line, both in the VeriThin and Ultra-VeriThin movements. Their stores are marked by the Gruen Service emblem. GRUEN WATCH MAKERS GUILD Time Hill, CINCINNATI, U. S. A. Canadian Branch, Toronto Engaged in the art of fine watchmaking for more than half a century GRUEN GUILD WATCHE THE OLDWAY VERITHIN WAY ULTRA-VERITHIN WAY Wheel train diagram, showing how the four operatingplanes of the ordinary watch are reduced to three in the Gruen VeriThin and two in the Ultra-VeriThin. Thus thinness is secured without loss in accuracy or durability of parts.