Right on every count. A Trek 400, the little numbers signify a parts variance. The Ishiwata tubing was cheaper that Reynolds, but was pretty much equivalent in every other way. The paint (Imron), the lugs, and the construction were identical. I have blind-tested Ishiwata and Reynolds Trek frames, for fun, and could not tell the smallest difference. Clean it up and ride it. Sometimes you'll see the stickers come up on eBay for not a lot.