This will likely help you:

http://www.zipp.com/...y/wheel_timeline.php

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Thanks! It looks like they are the 415's, anyone got any insight on them?

Not much pulls up when I google them...

Appear to be a pair of 303's from perhaps 2002-2005? ( I could be off on that)

Great wheelset for overall riding, cx, sprints, etc., just depends on what they are asking of course.

I'll take a punt and say they are from 2003 based the zipp catalog below:
http://www.zipp.com/...ogs/2003_catalog.pdf

Zipp appears to have only the rims so the spokes and hubs are a black box. Assuming the hubs also date from 2003 there is pretty good chance they are 9 spd max. The wheels are listed as being structurally carbon with a bonded alloy brake track. I would be more cautious about this design of rims than structurally alloy rims of the same era (carbon-alloy bonding poses some major engineering challenges which ditn't always go well in the early years of the tech).

I wouldn't advise buying them unless they are real cheap or you want them for a specific bike build. Carbon wheel manufacturing technology has moved on a lot in the past 14 years. The move to 11 spd means its pretty easy to find wheels that are a decade new than what you are looking at for reasonable prices. In all honestly I would expect modern 'aero-optimized' alloy wheels to perform as well if not better than Zipps.