P54C 133 == pentium (not MMX)

3.45V 66MHz x 2.0 == 133MHz
A80502133 SY022/SSS
ICOMP INDEX=1110 
C6220097-0313 
INTEL(M)(C)'92'93
E6105456CH A4 
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K6-233 3.2VIO 66 x 3.5== 233MHz
 
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K6-III 400MHz == 100 x 4.0 = 400MHz x.xVIO