Here's the various iPad model numbers and order numbers. The model numbers are on the back of the iPad
Apple iPad 3rd Gen (Wi-Fi Only) 16, 32, 64 GB
The Wi-Fi Only iPad 3 configurations are assigned model number A1416
MC705LL/A refers to the 16 GB configuration in black. The 32 GB and 64 GB configurations in black are MC706LL/A and MC707LL/A, respectively. The 16 GB, 32 GB and 64 GB configurations in white are MD328LL/A, MD329LL/A, and MD330LL/A, respectively.
Apple iPad 3rd Gen (Wi-Fi/4G LTE AT&T/GPS) 16, 32, 64 GB
The Wi-Fi/4G LTE AT&T/GPS iPad 3 configurations are assigned model number A1430
MD366LL/A refers to the 16 GB configuration in black. The 32 GB and 64 GB configurations in black are MD367LL/A and MD368LL/A, respectively. The 16 GB, 32 GB and 64 GB configurations in white are MD369LL/A, MD370LL/A and MD371LL/A, respectively
Apple iPad 3rd Gen (Wi-Fi/4G LTE Verizon/GPS) 16, 32, 64 GB
The Wi-Fi/4G LTE Verizon/GPS iPad 3 configurations are assigned model number A1403
MC733LL/A refers to the 16 GB configuration in black. The 32 GB and 64 GB configurations in black are MC744LL/A and MC756LL/A, respectively. The 16 GB, 32 GB and 64 GB configurations in white are MD363LL/A, MD364LL/A, and MD365LL/A, respectively.
Cheers, Tom 😉