Note: I'm trying to cross-post this to sci.electronics.repair, hope
it works. If not, I'll try to post the info that's there, over to
here.

Here's the physical description:

It's about 1/4" in diameter and 1/8" thick. The 2 leads are about
1/4" apart. The color is black with white charactors, which I next
describe. It has a triangle laying on it's base (ie, pointing up).
The corners of the triangle appear to have some detail, perhaps
looking like arrowheads. I suspect it's the manufacturers logo which
I think I've seen before, but I don't know which manufacturer. Below
the triangle are the charactors "K271" and below that "99".

Looking thru this site, the logo looks like it's Matsu****a/Panasonic.

http://www.dialelec.com/semiconductorlogos.html