Saudia 747SP in the 1981 delivery colors, which surprisingly none of the manufacturers have covered. Braniff N603BN, and China Airlines B-1862. I'm a big fan of the 747SP and like to see them in the first delivery registration. I would throw in ZS-SPA as well for South African, as that airplane set a record on its delivery flight flying nonstop from Seattle to Cape Town. I'm surprised NG hasn't covered that as they seem to like record breaking planes hence the N533PA in three different schemes, and United's Friendship One release.