Related Clues:

• Prohibition, e.g.
• Coldwell Banker competitor
• Silent ___ (time before the talkies)
• An earlier one may be recalled
• Paleozoic, for one
• Historical stage
• Ruth's was 2.28
• Unique stretch in time
• Paleozoic, for example
• --- of Good Feelings
• Several periods
• Period piece?
• Important historic period
• Geological time period
• Important time span