Illinois Watch Co. Model 4 Grade 404

34 views

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: 12 size (approx. 17 3/4''')
Shape: Round
Winding: Manual (Crown)
Hand Setting: Crown
Seconds Hand: Small seconds
Escapement: Lever (Swiss, English, Glashütte)
Date & Day: 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.