So my partner solved the clues and found out where we're going. I called QF to add his QFF number into the booking (couldn't add it myself for some reason). What surprises me is that he's got 39K, which is a premium economy seat on QF74, as serfty suggested this morning, albeit he's a NB. He's also got excellent Y seats on his other flights.
This is an award booking using my points and I am thinking that my SG status must play a role in these great seat pre-allocations for my partner (our PNRs aren't yet linked together). Lucky duck. I am happy. Thank you QF :mrgreen: