It's hard to know exactly which Grado cartridge you have, since the exterior appearances changed over time. But since the cartridge body is not wood, it is safe to say that you have one of the models that make up the entry-level group that Grado currently calls the "Prestige Series". The Thorens TD-126 Mk III was an excellent turntable (I owned one for about 5 years before buying my VPI), but if the cartridge and the TT are from the same production era, the cartridge is probably an older model also that is no longer made.
You might try looking at the Grado web site for more info: http://www.gradolabs.com/frameset_main.htm
You might try looking at the Grado web site for more info: http://www.gradolabs.com/frameset_main.htm
