Lampholder,Med Base SVCE (632, 642, 680)
   632    Use From Serial #1810000 to #2057436.
          Prior to Serial #1810000 See 7017874.
          Starting With #2057436 See 7017572.
   642    Use From Serial #1810000 to #2057436.
          Prior to Serial #1810000 See 7017874.
          Starting With #2057436 See 7017572.
   680    Use From Serial #1810000 to #2057436.
          Prior to Serial #1810000 See 7017874.
          Starting With #2057436 See 7017572.