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