Serial #N5S631 I believe it it an 87. Ironman Dave Scott with Tange #1
I bought this as a frame only, several years ago. I put on Shimano 600 components from another bike that had a crack. Later got into triathlons and did an ironman (must've been why I got this frame). Currently has 8 speed STI (no picture of this)
I really like this frame. A great compromise betweeen responsiveness and comfort (plus not a fan of the easter egg colors - even in 87)