iPad model numbers

iPad 3 – Black
MC705ZP/A – iPad 3 Wi-Fi only 16GB – Black
MC706ZP/A – iPad 3 Wi-Fi only 32GB – Black
MC707ZP/A – iPad 3 Wi-Fi only 64GB – Black

MD366ZP/A – iPad 3 Wi-Fi + 4G 16GB – Black
MD367ZP/A – iPad 3 Wi-Fi + 4G 32GB – Black
MD368ZP/A – iPad 3 Wi-Fi + 4G 64GB – Black

iPad 3 – White
MD328ZP/A – iPad 3 Wi-Fi only 16GB – White
MD329ZP/A – iPad 3 Wi-Fi only 32GB – White
MD330ZP/A – iPad 3 Wi-Fi only 64GB – White

MD369ZP/A – iPad 3 Wi-Fi + 4G 16GB – White
MD370ZP/A – iPad 3 Wi-Fi + 4G 32GB – White
MD371ZP/A – iPad 3 Wi-Fi + 4G 64GB – White

Source:
Apple iPad 3 (iPad 3rd generation) model numbers

Apple iPad 3 (iPad 3rd generation) model numbers