Definitely SN style. Note how the loop was tied off: it was 'served'. The 7-strand cable is doubled over with a 16" tail past the join. One strand is shucked off the tail and wound around both cables. The next strand is shucked back to there and repeat. It's done artfully, note the first strand ends just where the second strand starts. You can see 2-1/2 strands worth of wrap onscreen. This is why SN uses soft wire. WRM does the same: history must be served!