BBS 3 Piece wheels?

[pichos1]

looking for one wheel center or whole wheel and information on these BBS 3 piece wheels
any help would be appreciated!
regards
Jan

casting reads:
120
21
e30
BBS

 

[Ephriam K. Williams]

Man,...

Man,... I've NEVER seen one of those! Got to be rare as rocking horse poo! LOL! Coupes up!

Regards,