Flipside by Amy E. Anderson

Flipside

Knitting
May 2000
DK (11 wpi) ?
5 stitches = 1 inch
in Stockinette
US 5 - 3.75 mm
550 - 770 yards (503 - 704 m)
37", 42", 47"
This pattern is available as a free Ravelry download

Sometimes the interesting detail is on the flipside -- in this case, the vest has 2 back vents with button details.