X86-Secret : ES Zone
Pentium 166 Mhz ES  (Week 28, Year 1996)   
FV80503166 - Q019 ES/2.8V A4 - C6280906-0165 - '92'95

An early engineering sample of the Intel Pentium MMX 166 MHz. This processor features a ceramic package and a P55 core. It features the MMX instructions set. The official launch of the Pentium 166 MHz MMX was on Jan, 8th 1997. This sample was produced in mid-96.