Does weight matter that much? I don't worry much about the weight. This bike has a quality frame and parts which means that the weight can't be too bad.
That said, there is a fair amount of variation in terms of weight on production vintage MTBS. I like vintage MTBs and I have four that I ride on a regular basis. My lightest ones have prestige tubing. My 1993 Bridgestone MB 1 weighs in at 26 lbs; my 1992 Specialized Stumpjumper weighs 27 lbs. Neither bike is kitted out as a commuter though.
My commuter is a late 80s Specialized Stumpjumper Comp and it must weigh a bit north of 30 lbs.