I used to own one of these way back - brilliant monitor for its time. But no, it does not display standard 15k signals. You need a scandoubler to use it on A500/A2000. About the A1200 and its 31k signal I'm not sure but basically (from memory) unless you can generate a proper 50 or 60Hz signal, the 3D wont pick it up.
I still have one in use, and it works fine at 15KHz! I never use PAL modes, so I can't speak to that - but looking at the specs, it should.
This is still a good choice for many Amiga models. I good technician can bring these back to life - usually...
