Pocket Watch Database
Illinois Size 18s Model 4: Overview & Production
The 18-Size Model 4 was introduced in early 1890. The February 1890 issued of The Jewelers' Circular and Horological Review reported: "The Illinois Watch Co. having withdrawn from the National Association of Jobbers, will hereafter dispose of their movements through special jobbers in all parts of the country; so dealers who have heretofore been able to obtain this company's goods through association jobbers, can now have their wants promptly satisfied. The company has just placed upon the market, and have ready for delivery, an entirely new model openface 18-size pendant set movement. It has a straight line escapement, and the barrel is covered by a barrel bridge, which enables the watchmaker to readily remove the barrel and repair or put in a new mainspring."
Model 4 Features
Plate cut, finishing style, jewel count, regulator, and other features may differ between grades within the same model designation.
Size | 18s |
Configuration | Openface |
Plate | Full |
Setting | Pendant |
Finish | Gilt or Nickel |
Notes | Introduced February 1890 Fine Train |
Model 4 Image Gallery |
Model 4 Technical Specifications
Movement Thickness (with dial): | 12.57mm |
Pillar Plate Diameter: | 45.76mm |
Core Diameter: | 42.67mm |
Weight (with dial and hands): | 66.08g |
Measurement Notes: | Inner Pillar Plate: 42.67mm |
Note: Measurements may vary slightly depending on features, style, and time of production.
These measurements were taken on movement #1100533.