Back then Mad River offered one or two "Special Edition" canoes each year. In 1992 they were the Kevlar Explorer and Royalex Revelation offered with cherry-stained wood trim and Royal Blue gel coat. The Special Edition Kevlar Explorer had the scuppered inwales, contoured seat frames, kneeling thwart, contoured center yoke, and a Special Edition brass medallion on the front deck plate.
The advertised weight of 54 lbs was for the standard Kevlar Explorer. Back in the 1980s and early 1990s, MRC Kevlar Explorers were all cloth, all Kevlar construction, although in 1992 MRC also offered a Kevlar/Airex Explorer which was vacuum bagged and had an outer layer of S fiberglass with a PVC Airex bottom core and side ribs. That version was only a pound lighter than the Kevlar Explorer.
I have a Kevlar Explorer that dates back to the early 1980s that has the squared outwales before MRC switched to radiused outwales in 1985. My boat also has short, molded fiberglass deck caps instead of the inlaid butternut deck plates. I recall weighing my boat one time and got an estimated weight a pound or two over the advertised weight, which was pretty much par for most canoe manufacturers. The Special Edition Kevlar Explorer with its extra kneeling thwart and inlaid wood deck plates would likely be a couple of pounds heavier.
Although MRC used oil on inwales, outwales, and deck plates, back then they usually bright finished the seat frames, yokes, and thwarts. That probably accounts for their better preservation.