Great find!
This fare is available with countless airline combos for the same price, mostly *A (SQ, LH/LX + NH, LH/LX + OZ) but also ST (KL + EY, KL + CZ) and OW (QF + KL, LH/LX + CX).
Just play around with the dates here:
https://www.google.com/flights/?clie...;sc:b;sd:1;t:f
Here's one cool example, KL + EY + QF:
https://www.google.com/flights/?clie...3*2.USD.249343