National Geographic : 1919 Apr
THE SCIENTIF-P ICALLY BUILT WATCH AND THE FOREIGN BU AL WATCH Pendant and Bow Patented Know Something About the "Works" in the Watch You Buy IF you open your watch and examine its mechanism, you will find it consists substan tially of two supporting plates, between which is mounted a gearing of meshed wheels to take care of the movement, recording time. This is called the train, which we will speak of in our next advertisement. The lower supporting plate in a Waltham watch is the foundation upon which every unit revolves and is fixed. It is bored with minute holes to take the pivots, screws, pinions, etc. This lower plate is drilled and threaded by one of the most exclusive and wonderful machines ever designed by the genius of man - an exclusive Waltham invention from the master-mind of Duane H. Church. Many operations are accomplished with such methodical, automatic regularity that one instinctively imagines that a marvelous human brain guides the extraordinary opera tions of this machine. It makes every operation (and there are 141) with infinitesimal exactness to the ten thousandth part of an inch -flawless, beautiful in its complex simplicity-every plate a replica of every other plate, proving Waltham standardization to be one of the miracles of American mechanical genius. The plate of the foreign built watch is subject to the variations of hand process. Made to variant sizes and models without precise relation to the parts which they are to contain, which parts are made elsewhere in many homes and small shops, by hand. Waltham Colonial A No hand work could ever approximate the beautiful and flawless exacti Extremely thin at no sacrifice of accuracy tude of this Waltham drilling and threading. Maximus movement 21 jewels So when you buy a Waltham watch you are assured of a standardization Riverside movement 19 jewels of quality and leadership which has placed the Waltham watch on the $I35 to $255 or more pedestal of world dominion. depending upon the case WALTHAM THE WORLD'S WATCH OVER TIME "Mention The Geographic-It identifies you"