Type 68 - and yes they are the factory size and offset for e36 m3's... 96-99...
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Edit: PM sent prior to finding this thread... oh and $300 is a good deal for 4 rims in good shape... If they are in good shape and you back out for some reason; let me know... I'll take them.
Edit 2: Ok; so the history... those are the e46 330i, 330Ci or 328Ci (edited by Admin) sports package wheels... which works for me because a lot of e46 buyers go to 18" or 19" wheels and sell them... Makes for a nice track wheel at the right price.