X86-Secret : ES Zone
Pentium III 933 MHz ES  (Week 15, Year 2000)   
Intel Confidential QW39ES - 0015P005-0164 COSTA RICA - 80526PZ933256

Built on the first Pentium III Coppermine core (cB0), this engineering sample features 256 KB of full-speed L2 cache and a FSB clocked at 933 Mhz (7*133). This CPU is a late ES, perhaps the last which were produced. Dated early April, the Pentium III 933 was officially announced on 05/24/2000.