Ok it's the other one I was thinking of. I know of one still in service. Now a small shop with a couple guys and one of their dogs. That's the one I was thinking (I believe) I've replaced a line card fuse a few times. Back in my former office I used an 824 cabinet (it was square, unlike the ZTD cover) to put a portable heater on.

The system is probably still in use. Yes there's still many old Iwatsu systems out there, good durable systems.