X86-Secret : ES Zone
DX20DPR66 MS  (Week ??, Year 1992)   
DX20DPR66 / MECH. SAMPLE / Q040 / 1989 1992

This Mechanical sample is a rare sample of the Overdrive DX20DPR66. It was designed to upgrade a 486 DX20 to the same performance point of a 486 DX2 66. This mechanical sample comes with a Q040 datecode and was built somewhere in 1992.