Sorry, no links I'm afraid. I couldn't find anything online when checking out my own pieces. I think Decelle's Opalescence shows some examples, but again without any accompanying info.
Btw. That coaster of yours is a pattern I've seen stamped Etling. However, there are other Cesari models which don't appear to match Etling patterns. Cesari was maybe just a retailer's mark.. until more evidence comes to light it's sadly impossible to say...