Is the Dealer Code legible on the sheet?.
Here's the Briskin-Westville one below as of 1970 from the NCRS site...could show as 65 or 065..
Zone 15 Dealer 065 Status: Changed Name
Dealer Name Briskin Chevrolet Inc
Address: 1000 Gateway Blvd
City: Westville
State: NJ
Zip: 08093
Good luck!.
~ Pete