This buckle is a Nabisco Billionaire award buckle. It has a crest that says Billionaire, an armor helmet, and a shield with Nabisco and B. It is dated 1977.
On the left side of the buckle it says The Nabisco Difference, Thanks a Billion! There is a panel at the bottom where it could be engraved with a name.
The buckle measures approximately 3-1/8" x 2" and is in very good condition. What a neat advertising item this is.