Illinois Size 18s Model 6: Overview & Production

Soon after the introduction of the pendant-set Model 4, the American Waltham Watch Company (Robbins) and the Elgin National Watch Company (Avery) concluded a suit against the Illinois Watch Company for infinging upon a patent for a stem-winding watch [The Jewelers' Circular and Horological Review, October 5, 1892]. The courts decided the Illinois Watch Company was guilty of patent infringement and forced to pay damages to Waltham and Elgin. In early 1893, the company introduced the 18-Size Model 6, a lever-set version of the Model 4 [The Jewelers' Circular and Horological Review, February 8, 1893].

Model 6 Features

Movement Diagram

Example Image

Dial Plate Image

Note: Diagrams and photos displayed are intended to serve as a represenation of this model.
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	Lever
Finish	Gilt or Nickel
Notes	Introduced February 1893 Fine Train
Model 6 Image Gallery

Model 6 Technical Specifications

Movement Thickness (with dial):	12.20mm
Pillar Plate Diameter:	45.62mm
Core Diameter:	42..67mm
Weight (with dial and hands):	64.43g
Measurement Notes:	Inner Pillar Plate: 45.62mm, Weight Without Dial and Hands: 55.28g

Note: Measurements may vary slightly depending on features, style, and time of production.