Here is the specimen. As you can see one of the resistors broke off from the bottom of the PCB. After baking in the oven for about 12 min. and a gentle love tap, this is what you get:
Now I was curious how the top portion compared to a regular S478 Pentium 4, so I put the Xeon top next to a 2.6Ghz (Northwood, 800fsb) P4. This is how they match up:
So there you have it. The Xeon tops are close but are actually more like a mobile S479 from the bottom. So this is completely useless in the present day, but if anyone ever wondered about this about a decade ago, there you have it!