> This also does eliminate the possibility that these are re-labeled chips.

Does it? A full 68060 Rev.6 can be overclocked from 50 or 60 MHz to just over 100 MHz. That's 70+% overclocking. Running a 75 MHz part at 120 MHz only amounts to 60% overclocking. Even running at 133 MHz amounts to no more than 78% overclocking.

> Without an MMU or FPU these could be easier to overclock.

What do you mean "overclock"? Attempting to run the part past 133 MHz? Running a 133 MHz part at 120 MHz ist *under*-clocking, assuming the "possibility that these are re-labeled chips" is eliminated.

> surface mount chips aren't something a hobbyist would normally consider
> (when there are socketed alternative).

Yes, but are there any socketed alternatives to a 133 MHz 060FE? Anything like an 68(EC)060RC133?

> You did notice that the Sysinfo screens did seem to indicate a
> lack of MMU and FPU functions, didn't you?

Of course I did. Or how do you think I concluded it's the "MC68060FE133" board he ran SysInfo on?