X86-Secret : ES Zone
Klamath 233 MHz ES  (Week 28, Year 1996)   
INTEL KLAMATH - A64043JCA0-085 ES - DC80522PX233512 Q999 (M)(C)96

One of the earliest known Klamath (Pentium II) sample. The CPU Module (Q998) was built on July 1996 and the PCB 6 weeks later (end of August). The complete cartridge was assembled 6 more weeks after that (early October '96). It includes an Engineering Sample SRAM Tag (Q986) and 4x 128KB of L2 Cache. The Pentium II officially launched in May 1997.