Fresh from 1997, this is a Softride suspension stem for a threadless steerer:
I had this modified by Bike Friday for use with split bars on my Llama. It has a small centering screw added to the underside of the clamp, to locate the split bars during assembly. If you don't have split bars, it could be filed flat, or removed.
The bushings are original, but have minimal wear. It was removed
from service because I wanted 31.8mm drop bars, not because there
was too much slop when riding with my flat bars.
$55 shipped anywhere in the USA
-- John Thurston Juneau, Alaska