Illinois Watch Co. Model 4 Grade 173
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16 size (ca. 19 1/4”’) | Hand Wind | Swiss Lever | Small Seconds |
Remarks:
- Negative crown winding with lever
- Screw-set jewels (Chatons)
- Swan-neck fine regulator (Illinois Whipspring)
- Crown wheel on the back of the barrel bridge
- Model 4 is also available with a 3-finger wheel train bridge
- Model 5 is the open face (Lépine) version of Model 4 (hunter = Savonnette)
- Models 4 and 5 are also known as the Getty Model
- Listing ID: 637
- Manufacturer / Brand: Illinois Watch Co.
- Caliber: Model 4 Grade 173
- Size in French Lignes: 16 size (ca. 19 1/4''')
- Size range mm largest diameter: > 40 mm
- Shape: Round
- Winding: Manual (Crown)
- Hands Setting: Crown with lever
- Seconds Hand: Small seconds
- Escapement: Lever (Swiss, English, Glashütte)
- Date, Day, Month...: None
- Jewels: 15
- 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: 1896 – 1911 (47.319 Stück)
- Country: U. S. A.
- Identification: Movement marked ILLINOIS WATCH Co. Based on the serial number on this website: https://pocketwatchdatabase.com/search/result/illinois/1586607
- Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
- External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-57#post-7913992
- External Link 2: https://pocketwatchdatabase.com/search/result/illinois/1586607
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