Welcome to the forum!
I think the 166 is correct for that cpu. Since 333mhz is the speed that the cpu uses INTERNALLY the board fsb would be 166.
If its at 1.09 I have a feeling it is actually running the fsb at 100mhz multiplied by the 11 multiplier giving 1.0999999
166x11=1826 or 1.83ghz
Try running wcpuid...its a tiny little program, doesnt even need to be installed, just decompressed to a folder
go
here and get the one that says wcpu31a.exe
it should show multipliers and bus speed etc..that'll tell you whats what