Where used: MacBook Pro (13-inch, Mid 2009)
Substituted Part: 661-5857
Original Part number: 661-5233.
Apple part # 661-5857, 661-5233 Top Case with Backlit Keyboard (US), without trackpad for 13inch 2.26-2.53GHz Macbook Pro Mid 2009 - A1278 -
Original Part number: 661-5233.
Trackpad are sold separately: 922-9525.