I have an 89 S540CT6 that has the first generation AANJ. For some mysterious reason, the AANJ was used on the vintage trem 540-CT6 several years before they put it on the regular, Edge-equipped S540s. So in the 89 catalogs, both the Maxaas and the 540CT6 have the AANJ. The original design differed from the later versions though: it's a little more oblong looking (see pics in the 89 catalogs). Some people prefer the early design.