David is correct that it's a genuine chip. The Chip Rack shows it as N2025 (Value K+ $60-$74) issued in 1964. Bud Jones had the Nevada mold and made chips with it until 1978. Bill Borland didn't buy the rights to use the mold until around 1991.

This information comes from David's article on his website:

http://www.marlowcasinochips.com/links/genetrimble/borland/bjmolds.htm