Intel DX2ODPR 66
Identical to this Overdrive CPU. I've had this CPU for a long time and pulled it from a typical 486 system (Socket3, VLB, 8MB). I doubt the system had been upgraded with the Overdrive but instead was fitted with an Overdrive when the system was built new.
In essence the DX2ODPR is identical to a regular (write-through) DX2/66. However, the DX2ODP without R-suffix is different so you might double check your pin-out before using those.