OK, I see what you're talking about. Whew!

It's certainly from the Centurion manufacturer of the era. The serial number is in that gray region where it could be 1984 or 1985. Currently I'm leaning towards the latter. Most of the upper 1984 models had different stay caps and the mid-range models tended to have top mount shifters. Are there any bottle bosses and id so, how many sets?