X86-Secret : ES Zone
Pentium 233 MHz ES-P  (Week 13, Year 1997)   
BP80503233 - Q140 ES/2.8V A4 - C7139570-4212 '92 '95

An engineering sample of a Boxed Pentium 233 MMX. The CPU comes with a classic PPGA (Plastic) packaging and a Q-spec of Q140 (the famous "mysterious" stepping). This particular sample was produced in early April '97 and the final Pentium 233 MMX were introduced on June, 2nd 1997.