12 size (approx. 17 3/4”’) | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Negative crown winding
• Screw-set jewels (Chatons)
• Swan-neck fine regulator (Illinois Whipspring)
• Center wheel bridge and mainspring barrel bridge are connected, as are the escape wheel bridge and fourth wheel bridge
• Model 3 Grade 404 is the corresponding Open Face/Lépine variant:
• On the Illinois Model 3 Grade 404, there is a small lever on the edge of the movement at approx. 11:30 with which the movement can be brought into the winding position when removed from the watch case. This does not exist on the Model 4 Grade 404.

• Listing ID: 577
• Manufacturer / Brand: Illinois Watch Co.
• Caliber: Model 4 Grade 404
• Size in French Lignes: 12 size (approx. 17 3/4''')
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: None (Negative Winding)
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: 1911 - 1920 (15.870 pieces)
• Identification: Movement marked ILLINOIS WATCH Co. Based on the serial number on this website: https://pocketwatchdatabase.com/search/result/illinois/3455043
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-58#post-8082654
• External Link 2: https://pocketwatchdatabase.com/search/result/illinois/3455043
• Country: U. S. A.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)