Pocket Watch Database
Illinois Grade 510
Grade 510 is a 23j Openface watch maufacturered by Illinois. The size 12s, Model 4 movement features a nickel finish and is adjusted to 5 positions, isochronism and temperature.
Grade 510 Movement Characteristics
- Size12s
- Jewels23j
- ConfigurationOpenface
- FinishNickel
- Model4 or 4
- SettingPendant
- AdjustedYes
- Railroad GradeNo
Grade 510 Production Info
- Total Production423
- Number of Runs11
- Production Years1911-1918
- First Serial2,386,741
- Last Serial3,425,000
- Largest Run100
- Smallest Run3
- Most Common Run10