I saw it with my own eyes. I am sure there are a few ways to make this work.
The guy used this device to scan the original iclass se: Model OMNIKEY 5427 CK.
He was able to generate the 0607816ac0 number using that reader.
I was given the iclass se back, and he could generate a duplicate ONLY using the 0607816ac0 number - nothing else; no other info was provided.
I scanned the new card using my own proxmark3, and was able to get the data provided above.
How familiar are you with Iclass, iclass se?