Actually, the ART 7 has me curious. I've had my DL-304 for a lot of years now and though I've always had additional music sources, I've got to wonder how many hours I actually have on that stylus.
There is a version of the Garrard Zero 100 designated Zero 100C. C for counter. I have one but managed to f***up the counter some years ago while trying to reset it. So just a plain Zero 100 now.
From Vinyl Engine:
The Zero 100C has an automatic record counter built into the pickup arm to give an indication of elapsed stylus playing time, but is otherwise similar to the Zero 100.