90's 498T pickups were made really hot - I have a '98 studio in Ruby Red ( my profile pic) and the 498t measures almost 14k. Mine's a little newer but from the same era, no markings on the pickups, almost identical wiring harness. Mine is about 10lbs but they were weight relieved since the mid-late eighties with the swiss cheese holes so yours has a small amount of weight relief same as mine. I keep saying it is the best guitar I have ever played, it sounds amazing - much better than any Gibson I have ever owned. I don't know the general consensus on the era, but I love my 98 studio