Were yours painted, or are they just dirty? The finish looks a darker shade than stock.
BTW, there were only two versions of the Style 24 LTW wheel which are both forged and staggered, the '95 LTW stamped, and the later '98-'99 polished (non-stamped). Both versions were forged, I have/had both types, and personally seen the fakes. Anything cast would be a knock-off, not OEM. If there is an OE cast version of this wheel, I would like to see the BMW part number.
Polished version on my old TI
Stamped version on my current TI (for sale)