815-9952 A 922-8567 Early 2008 - Late 2007 13inch Macbook Bottom Case, Black NB-1844W This is a bottom case assembly for the MacBook 13". This is a Black bottom case. There are two versions of this bottom case. 922-7592/922-8132 is for the original core Duo and Core 2 Duo Macbooks that have the apple symbol on the command key (the key next to the spacebar.) 922-8286 is for the Santa Rosa and Penryn Macbooks that do not have the apple symbol on the command key. Apple part number: 922-8567, 815-9952 A