I bought this labeled Casa, is it?
pic 3-14

I am far from a semp expert, but one thing I have learned in my experience with these plants is that it can be very difficult to make a 100% ID due to the many different factors that can affect their appearance (everything from time of year to growing conditions).

Perhaps someone more knowledgeable about this particular species will drop in, but until then here is the link to the Casa entry in the database.
It appears after viewing the page that at one time there were incorrectly labeled Casa being distributed...
Hen and Chicks (Sempervivum 'Casa')

I don't think that's the real Casa.....

would you please take photos in later spring and mark me to take a look - or better post it to the Sempervivum-Forum where I try to watch every post;

Peter

thank you Peter will try to remember to do that. That pic was taken this March
this one June 2013