You are bidding on a NOS Delco 1115043 ignition coil.  

GM part books lists it as 

• 1964 Impala 409 with 400hp & 425hp. 
• Also correct for 1960-1965 Corvair- all 
  

Was sitting on the shelf in the old Chevy garage. Bracket included as shown. 

New & never installed.  Very nice condition.