The closest modern equivalent with a black label is the Bulleit Barrel Strength Kentucky Straight Bourbon Whiskey, which is an ongoing limited release.
Mash Bill: It uses the same high-rye mash bill (68% corn, 28% rye, 4% malted barley) as the standard Bulleit Bourbon.
Proof: As it is bottled straight from the barrel, the proof and ABV vary by batch, typically ranging from 120 to 125 proof (60–62.5% ABV).
Awards: This expression has received critical acclaim, including a Double Gold Medal at the 2018 San Francisco World Spirits Competition