820-2796-A 661-5781 Logic Board 1.4 GHz, CTO - 11-inch A1370 MacBook Air Late 2010 NB-1357W
This is the 1.4Ghz Logic Board for the MacBook Air.
Apple part number: 661-5781, 820-2796-A
661-5781, 820-2796-A Logic Board 1.4 GHz, CTO - 11-inch A1370 MacBook Air Late 2010 8202796A