Any question answered...

Think I have figured it out. eBay listing states:

This is a Miche cassette at ten speed we do two products one is compatible with Cam this comes chromes plated while the Sh compatible comes in a Mat finish.
We have sprockets from 11 up to 29 this will give you an excellent range to choose from cover T.T. set ups or we can do junior racing set ups or hill or mountain climbing setups

The largest sprocket looks shiny (chromed) compared the the other 9 sprockets, right?