They appear to be the 17inch wheels from a 900SL but with black painted spokes. They do not look like the 16 inch wheels of the Santamonica or 851 Tricolore as the front discs are 320mm brembos which cannot easily be put on 16 inch wheels and the centre spokes are attached differently. If they are 16 inchers, they will be from a 1989 400SS Limited Edition. Any way you look at them, they are very nice wheels but it wouldn't hurt to ask questions...