paulbonner, If you want to get the year that model was available, we can do that quite easily. Look at the back of the rear derailer and the front derailer. You will find a 2-letter code stamped in the back plate that seems to make no sense. Write the letter codes down. The first is the year the derailer was made, the second is the month. Then go to vintage-trek.com and look on the left side for a section called "Component Dates". Open that screen and click on "Shimano". You can now decode the year the derailer was made. If the month it was made is late in the year, the bike may be the next year's model. If in doubt, post the codes here and we'll help.
BTW, that's a sweet looking bike. I kinda like the decals. Interesting, there is no head badge decal on your bike.