The OP is clearly a reverse delay tho.
That song is from 1984, so I doubt that's a reverse delay... I really think that's recorded backwards.
The part in the OP is a normally recorded part played backwards. It isn't being done live in the studio. It isn't a reverse delay, that's why you hear the swells. It is the envelope of a decaying note playing in reverse.
^^^This. Backwards recording on the original track. But I agree w/ everyone who's opined that the best way to approximate this sound live would be a reverse delay. Key word being "approximate"
btw, there's a postumously released mini-EP by Dali's Car called In Glad Aloneness that contains a re-arrangement of that track. Same approach to the bassline, clearly similar motifs, materials, and backwards effect...quite possibly culled from the original 1984 track, or possibly alternate takes from that session. But also brilliantly reinvented. Highly recommended for fans of the original.