At least I think it's an '89; certainly it's late 80s with a U-brake. I rebuilt the Specialized Rockhopper for my nephew who wants a bike to ride around town and go to school with. The bike is about a decade older than he is.
It has good quality 26 x 1.5 tires (with tire liners), new cables, new chain, new grips, and new shifters. I had to go with a 7 speed rear wheel that I robbed from an early 90s rockhopper as the old wheel was shot so I went ahead and replaced ths shifter as well. The sun friction shifters work well and they're a good deal at around $10 with cable and housing. I used old parts as much as I could. I also overhauled the bike.
I'll ride the bike for a few days to check it out before boxing and shipping it. I'll also get rid of the quick release seatpost binder bolt and replace it with less stealable one before I ship it.