Possible Clues:

• Twin having fallen from campanile?
• Late caller gets double
• One no longer able to make changes could make one spit
• Exhausted campanologist's double?
• Spitting Image, Six Feet Under, Band of Gold and Casualty?
• Image that might explain silent phone call?
• Gunsmith Henry whose namesake pistol is spelled with an extra R
• Look-alike
• Exact replica phone cut off, perhaps?
• It looks like one campanologist is late