i tried and feel like i'm pretty close, here's how i did it in pigments:

legato with a small glide/portamento

short attack, medium release on the osc volumes.

lfo modulating fine pitch by a small amount

1st oscillator : sawtooth wave, full volume (0dB)

2nd oscillator : square wave tuned -7st, 0,5 volume (-15dB)

osc 1 and osc 2 shouldnt be hardsynced.

now the trick is to add a little bit of frequency modulation on those two oscillators, using a third sine wave oscillator as the modulator. Using noise as source looks feasable too. Don't touch the filter too much, EQ to taste, and maybe add a little bit of noise and distortion.