Sorry I just realised I was spelling the company name wrong 🙁 Now I have realised, I found a little more information. This is the only listing that I can find for it so it can’t have been very popular at the time.

[url=http://www.mcparkantiques.com/karlovarsky-porcelain-haas-vintage-china-czjzek-demitasse-tea-set.html]Link to listing <---[/url]