Freescale support...
"I can confirm that MC68060FE133 is not a valid Freescale part number. I cannot speculate about what the devices you were offered might actually be."
The key part of your quote from Freescale above is "not a valid
Freescale part number". It could be a valid "Motorola" part number that was produced before Motorola was taken over by Freescale, couldn't it?
I am still not convinced that this part is not a legit 133MHz part from Motorola and would like to see more proof before being convinced that it is a re-badged 75MHz part.