Here is photo of a metal (made in USA) fingernail clipper. It is engraved with this text: "Call SHANNON O'NEIL ... Davies Chevrolet, Inc., EA 2400 AD 1239" .... Research has not come up where this dealership is/was. If you know, please let Wildcatville (wildcatville@gmail.com) know.
Perhaps the Telephone Exchange Name Project will indirectly help in the search?