Pocket Watch Database

Illinois Grade 506

Grade 506 is a 17j Openface watch maufacturered by Illinois. The size 12s, Model 4 movement features a nickel finish and is adjusted to 3 positions and temperature.

Grade 506 Movement Characteristics

  • Size12s
  • Jewels17j
  • ConfigurationOpenface
  • FinishNickel
  • Model4 or 4
  • SettingPendant
  • AdjustedYes
  • Railroad GradeNo

Grade 506 Production Info

  • Total Production6,030
  • Number of Runs26
  • Production Years1911-1918
  • First Serial2,368,601
  • Last Serial3,424,500
  • Largest Run600
  • Smallest Run10
  • Most Common Run500