Chronology of call letters 6XAM

From Radio-TV Broadcast History

• Date: October 1, 1921-March 6 (or 10), 1922 ( NOTE: Sources differ as to the exact date of change to KLS.)
• Frequency:
  • 833 khz (...March 6, 1922)
• Location:
  • Oakland, California (October 1, 1921-March 6, 1922)
• Owner of license:
  • Warner Brothers Radio Supply [or "Supplies"] Co. (October 1, 1921-March 6, 1922)
• Subsequent call letters: KLS