The Thorens TD-125 had been in production for several years before the Sondek hit the market. I bought a Mk.2 version in '73, don't know how it differed from the original ("Mk.1"), but it never worked right. I replaced it with a TD-150, basically a TD-125 without the electronics. There was later a TD-126, a real gaudy-looking table. The Sondek was (and is) a model of outward simplicity, inner attention to detail.