They are a 4 bolt pattern for a Porsche 914 (and some vw stuff) with a 14mm radius ball lug mount. The backspace is 4 3/8" and the width (outer lip to outer lip) is 5 7/8". The rim edge thickness is 1/3".
One caveat is that they are tube rims, so you will have to run tubes or figure out a clever way to put a valve stem in them.
Please reply to the email on the ad and leave a phone number and I'll get back to you quickly. I can provide more pictures via email.
They are similar to the ones in the link below, but they are not polished.
http://images.thesamba.com/vw/classifieds/pix/3792436.jpg
Aaron
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