To be honest I am a little clueless when it comes to ID'ing chips and what the codes mean. I picked up two of these exact same codes on ebay both OEM, so they didnt come with a retail box...the first one I've tested and not lapped yet:
http://www.overclockingpin.com/L624%20chip.jpg
The 32m was done around 1.84v/-107c :D on my evo unit. Other benches 1.87v/-115c. Chip can go to about -134c before I encountered freezes in windows, but that is idle and with under 1.89vcore.
Keep in mind, just doing p5b pi stuff with high mem mhz and not pushing the chip too hard. To really see what the chip can do, best to put it on p5w64 with ovp mod and slack up the mem and strap.