The rear hub says "Santour HI" the front hub says "Santour HG." The cassette is "Santour APII." They're mounted to Specialized BX23 wheels.

The bike appears to have never been serviced, and all parts appear to be original - except the BELL grips. I'll try the double chain whips tomorrow to see if they pull the first cog. Other than that, I'd like to avoid swapping everything out with new gear since most of this stuff is still in working order.