Spider wheels with odd offset?

[www.pxwheels.com]

Hi guys, I've just had a pair of 18" spiders come in with what apears to be ET53 offsett, any idea what these would have been used on?, maybe they are ideal for a Griff Chimeara conversion? The guy I bought them off had them on an EVO so there are no clues there, can anybody shed any light.

OZ