Illinois was a great watch factory centered in Springfield, Illinois. Many of their watches were destined for railroad use but many others were watches that graced the waistcoats and vests of the well-heeled. This is a special hexagonal case model called the "Sterling". The designation referred to the quality of the fine 21 jewel movement, and not the case material, which in this case is 14K white gold filled, measuring 47MM by 55MM. The dial is two tone with a matte white outer background, for the chapters, and a reflective inner hexagonal shape that bears the Illinois mark. The Arabic numerals and seconds track are mirror-like silver. The contrast for this beautiful dial is a wonderful pair of blued steel hands that have diamond shaped ends. The back is plain polish with an interesting arcade band that follows the case contours. Remember all of our timepieces come with our famous one year warranty for parts and labor. The 21 jewel movement, Circa 1923, is a strong runner and a very accurate. timepiece that you will be proud to own and display. It is also a delight to look at. The movement plates are beautifully damaskeened and display gold headed screws which contrast with the silvered plates.