I'm trying to find my part numbers for my rotors because I'm replacing them when I replace the hubs (as soon as I find the right rotors!).

So, I looked this morning before work because I lost the copy I had somewhere else and the part number on the rotos is 1625W72. I don't know why it would have a W in it, but I'm fairly sure it did.

Also, I have The P/N from the Girling caliper (ABS 2-piston): 06732121372, but I got no hits. Does anyone recognize the format of the p/n or have a similar p/n on their car?
I'm going to order the parts tomorrow and pull the wheel tonight because I don't feel like screwing around with this kind of thing.

On a side note, I had a very disturbing thing happen this morning, but I think I figured it out. When I was starting to pull away from where I dropped off my dad, I turned the wheel to the left and got this straaange shuddering feeling. My first through was that my wheel bearings had something to do with it, then I discarded that and thought maybe the rack was failing as a tech from Kruse/Lucas had stated volvos tend to. After freaking out for about 1 minute, I noticed the pavement had an odd consistency and decided to drive out and see if the same thing would happen. As soon as I got out of that parking lot, the issue went away. I tried it stopped at a light with the brakes on and off (in neutral) and it didn't happen. It seems like the combination of my weight on one side of the car and the turning of the wheels on funky asphalt made the tires vibrate - only on the drivers' side. Am I crazy or is this plausible?\

-Will
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1990 740 Turbo, on its way to stock specs, maybe beyond