The Illinois Watch Co. used some very fancy dials on some of their dress watches. This dial is on a 12-size grade 439. The silver dial is finely engraved and has inlaid enamel numbers and linework. It is marked on the back by Stern Freres (Swiss) who I am told also made dials for Patek-Philippe. The 18K case isn't bad either, with white and black enamel details. The movement is a 21-jewel Extra-Thin 1st model. Most of these 1st model extra-thin watches (17j grade 435, 19j grade 437, and 21j grades 438 and 439) came in elegant cases and were very high quality. Frustratingly, I have not been able to find any period literature or advertising about these watches, which were marketed for only a brief time before being superceded by later models. These 1st model extra-thin Illinois are one of my pet research projects, and I would appreciate hearing about any other examples, in any of the grades.
