Harrach was established in 1630 and is still in production today. Harrach glass is rarely signed. Harrach glass blanks were used by most of the major Bohemian glass houses during the 19th century, including (but not limited to) Moser, Fritz Heckert, J & L Lobmeyr, Josephinehutte, Egermann, Goldberg, Muhlhaus, etc.