I.W. Harper Bottled in Bond Bourbon 100 Proof 1964 – 1969

I.W. Harper Bottled in Bond Bourbon 100 Proof 1964
The I.W. prefix in this brand name derives from Isaac Wolfe Bernheim, who founded the brand. With his brother he helped establish Louisville in Kentucky as a center for Bourbon production. Sadly, he felt Harper was a more marketable name than his own to apply to the bottles. 
This was distilled in 1964 at the Bernheim distillery in Louisville before being bottled in 1968.
United Distillers discontinued the I.W. Harper brand in the US in 1980s, but still exported some bottles overseas. The modern iteration of United Distillers, Diageo, revived the US brand in 2015.