This stem was originally white.  I went through a phase where I liked the look of raw aluminum on my bikes, so I stripped the finish.  I didn't finish the job so you can tell it was originally white.  You could powered coat it white again or any other color for that matter.  Hollow stem bolt/quill style.  I tried to provide as a many pictures as possible to accurately present the condition.  Do not hesitate to  write with any questions.

Survivor condition

0833

Cr-mo

Sr

Japan