It may be a Campagnolo cassette. They don't put their name on the cogs as far as I know, but you can tell by the code numbers on the cogs. I would think the Shimano chain would work fairly well as long as it's made for the same # of cogs. 10 speed chain for 10 cogs , 9 speed chain for 9 cogs etc...
You can go to the Park Tool website and they have a section on repairs & adjustments.
Last edited by Homebrew01; 05-24-10 at 08:57 AM.