Just got a used front Hub from a donor which is 2009 S60.

After examine the hub, what surpprised me is:
- There is no part# on it, I think for most of Volvo part there should be a part#;
- There is no VOLVO mark on it;
- There is no SKF, FAG or RUVILLE mark on it which I think are the 3 OEM supplier;
- There is only two marks: 'KM', 'ZJ' which give me no meaning.

Can anyone give me some idea what are the marks should be on an OE hub ?
Want to make sure it's OE one before put it on.

Thanks.

Howard