[QUOTE=T-Mar;22429003]Thnak-you for the contributions. This frame was built during weeks during weeks 33-34 of 1983 and is in the gray region of the 1983 calendar year where it could be either a 1983 or 1984 model. If the tubeset is Tange, then the decal points to the plain gauge #5 tubeset for the main tubes, with the stays and fork blades being a lower grade material, almost certainly hi-tensile steel. [QUOTE]

You're welcome. I am curious about how you derived plain gauge #5 tubeset for the main tubes and lower grade material for the stays and fork blades? The Roadace RX7 was the top of the line for the Roadace series and my 87 model came with a much higher grade quadruple-butted chromoly tubing. The Roadace 707, from what I have researched, is the predecessor to the RX7 and the one I listed in my original post has Cromo Butted tubes. If the earlier version (Roadace 707) of the 83-84 RX7 has butted tubes and the later one (87 model) has butted tubes, wouldn't it dictate this one to has butted tubes as well and not plain gauge #5?

As for the other two frames, you are correct, the brakeset is Shimano New 105 SLR not SLX and the other is the Roadace 707 not RX7. That's what happens when you type something up after a long tiring day!