Mystery springs?

[GAJ]

I have some BMW springs that are supposedly for an E30. The fronts are stamped 1131333 which I've ID'd via realoem.com. I'm puzzled about what the rears are--they're stamped 1132317 and I can't find a reference to this number on realoem.com or anywhere. Any ideas?

[E30_fiend]

Pictures would help greatly. Maybe even just more info. Color? Number of coils?

Taylor