Since it was the first song Spice 1 did and the Dope Lika A Pound Or A Key tape was recorded between 1988 and 1991, that means this song was recorded in 1988.

It has been remixed several times:
187 Proof (Part 1) [1991]
187 Proof (Part 2) [1991]
187 Pure [1992]
187 Proof (2 Thougin') [1999]
187 Hemp [2006]