I think this set maybe a little later than 18.1.91 simply because of this tune https://www.discogs.com/The-Clepto-M...release/144332 and this tune which was on TP and Promo on the 12 of December 1991 and released in 1992, i remember it well, here's the test press link https://www.discogs.com/EQ-Ghetto-Bo...elease/3952193 and the promo link https://www.discogs.com/EQ-Ghetto-Bo...elease/1091665 and my link which i posted https://www.discogs.com/EQ-True-Devo...release/238170 take a look at the Notes section, alot of the other tunes are much later than early 91 too..