Gruen pioneered the curved wristwatch and dubbed it the "Curvex". Because they held the patents on the curved movement they were able to out-pace their competition. Not only could they make a better and more robust movement (due to more useable real estate inside the case) but they could curve it dramatically to fit the wrist. This great idea was brought to market for the first time in the late 1930's and was produced for a decade in a variety of designs. The angular design of this particular Curvex identifies it as a later model, made circa 1948. The case is yellow gold filled and measures 44mm long by 22mm wide. The 17 jewel movement is running and keeping time just like the day it was made. The angular design of the case is reinforced by the highly arched, faceted, crystal. Gruen was also one of the first companies to incorporate the faceted crystal in their designs. Notice how this "roof-shaped" crystal adds to the unusual look of this watch. Make sure that you take a look at the "Zoom In" photos to really appreciate this fantastic timepiece. The watch has an overall architectural aesthetic that makes it almost irresistible! When you strap this killer on your wrist you will come to appreciate it as a real work of art. The one year parts and labor warranty provided by Father Time will make your experience with us pain free!