Possible Clues:

• Store door nos.
• 9 a.m. to 5 p.m., e.g.
• Storefront-sign abbr.
• Info on a store's door: abbr.
• Time measures: Abbr.
• Store sign abbr.
• Abbr. on a store door
• Secs., mins., ___
• Time pieces: Abbr
• Storefront postings (abbr.)