This is the left speaker assembly for the MacBook 13" Unibody..
Speaker is on the left-hand side when facing the screen.
Part Numbers: 922-9772.
Printed Number: 609-0310-C.
<li class="maclist-li"><h4>Compatible with : </h4>
<ul>
Pro Retina 13 (A1378, Mid 2012/ Mid 2012/ Late 2011).