Thanks for all the info!

The bike's components:
- derailleur: Suntour Cyclone, couldn't find any serial number.
- brakes: Dia-Compe G, with the number 1180.
- rear hub: Maillard, with the numbers 36 86.
- front hub: Suzue, no numbers
- cranks and handlebars: SR, no numbers

Based on the information at the Vintage Trek website, the 1180 on the brakes indicates November 1980 and the 36 86 on the rear hub indicates the 36th week of 1986. I'll venture to guess that the Maillard hub is not original, and that the bike was made in late 1980. There's also supposed to be a date stamped near the handlebar ends; I'll have to look when I replace the bar tape.

T-Mar: The bike's serial number looks like CS#####, where # is a number.

Finally, does anyone know what kind of steel this bike is made out of, or how I can find out? The reason I ask: I have a 1984 Valite Fuji with chipped paint and exposed metal that hasn't rusted despite a winter of commuting in the rain, while all the chipped areas on this bike are completely rusted. Maybe this is a topic for another thread...