It is the three-core double shield wire made of the same “magnesium shield” as the high-grade type MGL-1000A.
Ultra-fine soft steel wires of the same standard as 1000A is used for the conductor.
The IEC plug is made by Swiss SCHUTER.
The power plug is a medical plug from Meiko-sha.
It delivers highly refined S/N and resolution that are characteristic of magnesium shield despite being a standard model.