Possible Clues:

• Dakota ___ (old geog. designation)
• Puerto Rico or Guam (Abbr.)
• Pre-statehood area: abbr.
• Guam or the U.S. Virgin Islands: Abbr
• Ariz., e.g., before 1912
• Luxury apt. feature
• Territory (abbr.)
• Can.'s Northwest ___
• Guam, for one: Abbr
• Okla., on old maps