Maybe it's a slightly new revision of the iMac 5k... you might see that number change to it's proper long name when the 10.10.3 update comes out?Heres the screenshot.
It's only this window that is not displaying the info correctly. Everything else looks ok i.e display, storage, memory and so on.
Seriously, I get this everytime I update my OS:Now the apple guy did see my desktop with some kind of program I had to install...
Rang the retailer - as it CTO I might wait 6 weeks for a replacement.