Originally Posted by masi61
I just re-read your original posting and see that its a 1988 model. Its kind of old to be paying $275 unless its really high quality or special in some way. Is is a Centurion brand? I'm not familiar with a "Diamond Centurion".
"Diamond Back" was Centurion's mountain bike brand. As their mountain bike sales eclipsed their road bike sales, they started selling the road bikes under the "Diamond Back" ("Diamondback"?) brand. So I'm guessing this is a road bike (it has "brifters") made by that company.