Yes it's SS. It was designed by Roger Russel to replace the C-24 that was not exactly a raving success. It's the same generation as the MC-250, 2100, 2505, and 2105.
That equipment is like the Energizer Bunny. It just keeps going and going. Plus it keeps appreciating. One of the nice things about this music listening hobby is there is so much room for diversity. You can have extremes like me at one end who only change gear when it completely goes up in smoke or the other end of the spectum where folks change gear like underwear; almost daily