A vintage, new-old stock Shure C55 cable and plug set suitable for the microphones listed below. It terminates in bare wire and will need a jack plug at the other end.
It is suitable for these microphones:-
S1
S1S
55S
55SW
315
315S
440SL
520SL
535
540
540S
545F
545SF
550S
581SB
581SF