Mom's vest was gifted with needles this Christmas but once I could knit out in the open I was able to finish it up pretty quickly and she is wearing it today.
Mom loves it (black goes with everything) and it was a perfect fit!
I used Young Touch mercerized cotton by Estelle (probably discontinued by now I bought this yarn so long ago) and the pattern is SideCurl Cardigan Vest by Janet Szabo.
I made a few adaptations to meet Mom's preferences -- a plain stockinette back (rather than cabled) and no buttons on the front band.
I did find it very taxing to knit the cable pattern with black yarn (a strain on these aging eyes of mine) and it's hard to see the stitch definition from any distance, but it does make for a very classy looking vest and to repeat my mother, "It will go with everything!"