AC compressor identification

A while back I bought this A/C compressor that supposedly came from a 320i. I'm now wondering if this is an actual e30 compressor or rather an e36 one perhaps ?

Seiko seiki SS15B5, with pn 64528391123.

Realoem says it fits an e30 but I don't recognize that pulley, the usual V-belt wouldn't fit on it.