Well I did buy one of these Cardone dizzys in the end, quite some time ago now. Only just got around to putting it in!
So turns out these are re-built in Mexico of all places

It does indeed look like brand new, mine was electronic ignition with electronic module included so just plug and play but no serial # or brand name to speak of. Should have taken some photos to show, looks decent enough everything media blasted/re-painted. Drive gear down the bottom looked slightly worn so they obviously just clean up the old gear to re-use. Trigger wheel thingy looked as good as any. I bought it hoping to sort out a weird pinging issue I've had; always put it down to the dizzy advance now working properly but now I'm not so sure.
So I installed it, no dramas there, fired her up and it was spot on timing wise first crack!

Took it for a drive and noticed no difference at all over the old dizzy...dang. Problem is bobbing along at 60 km/h in 4th at low throttle I can hear a very faint rattling sound, exactly like pinging and very persistent. Even with next to no load it's still there even though I'm using 98 RON with timing at 8 degrees BTDC. If I open the throttle a bit more it goes away. 60 k's in third is no problem.
So it must be running lean I hear you say? Yet spark plugs are text book tan colour, isn't that perfect running? And this Weber running on 98 uses more fuel than my old Hitachi even with economic driving. Maybe I should open the mixture screw a touch. Or install a O2 sensor in the exhaust to see what's really going on here.