How can be that it's totally empty?, it's some kind of preproduction item?
Seems that Piru's tool identifies the exact 060 rev., how is this done?, does the CPU has an internal signature?
It's really tempting; but my A3000 has no way to be pushed past 50Mhz, at least without changing ZIP rams and my A1200/Blizzard 1260 has no socket 
There is an internal register called PCR : the revision is engraved, impossible to fake even chinese cannot...
And yes, WhichAmiga read this register, and Scout too !
I guess chinese starting removing the original label "68060RC50" for later printing "68060RC75" to sell CPU easily...
I garantee it's a rev6, a true one for sure, I checked by myself on my Amiga hardware here !
I remove old 060 and solder new 060 for 25 euro + shipping back to you
