> From Freescale on April 4th 2011.
> >Dear James Igou,
> >In reply to your message regarding Service Request SR 1-737352976:
> >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.
> >Should you need to contact us with regard to this message, please see the notes below.
> >Best Regards,
> >Eric
> >Technical Information & Commercial Support
> >Freescale Semiconductor
> [...]
> Further, in a later response the same technical support agent reaffirmed
> that the highest clocjked 68060s run at 75Mhz.

Seems as if another inquirer might have got a different response:

http://www.amiga.org/forums/showpost.php?p=746966