2 RNZAF C130s and a 757. No idea why they’re doing a low flyover over Auckland today, and the internet doesn’t seem to either. Maybe it’s in celebration of the fact that 40 Squadron has 3 planes actually working at the same time - those two C130H’s are either 51 or 54 years old depending on which tail numbers they are, and the 757's no a spring chicken either. Roll on the J models in 2023.
Somebody on Twitter got a better shot (video):