It was in exellent condition, but it was also dark sounding cartridge, i tried a few MC phono stages, headamp etc (but no sut). I love Reed tonearm and highly recommend it, but Supex was definitely not my cup of tea.
I have a few High Output MC cartridges that i like: Argent MC500HS (Sapphire cantilever) and Argent MC500. Both made in the 80s (OEM) by the same company who introduced recently $8000 Etsuru Urushi LOMC https://www.audio-activity.com/etsuru-urushi.html
Look at the compliace of the Supex, if that's 8cu then it must be paired with high mass tonearm.
Kiseki is probably mid compliance, so no problem with modern arms, but it depends on which one.
Why do you need HOMC cartridge if you can find much better MM/MI or LOMC as an alternative?