Cool. Then I need not look for one of those Yellow '87s and I can continue to Masterize my Miami Vice. I found this also on Sheldon Brown's site:

"The Ironman Dave Scott model name replaced Comp TA in 1985 and with the name change came indexed shifting with an upgraded Shimano "New" 600EX group. In 1987 the economy Ironman Expert Dave Scott model, with its Shimano 105 groupset, appeared and the "Master" designation was added to the original Ironman Dave Scott to distinguish it from the "Expert." The frames of both models were identical, featuring the same Tange #1 tubing, itself renamed from Champion #1 . At about this time, a TIG-welded fork crown replaced the more graceful, semi-sloped investment cast fork crowns of the Comp TA and the earlier Ironman models. My 1988 Expert weighs about 21lbs."