From the OHS PC Database, derived from A Guide to North America Organ Builders by David H. Fox (Organ Historical Society, 1991). --

In Vorarlberg, Austria in 1975; later Schwarzach, Austria

From the Rieger Orgelbau website (English version), accessed Oct 25, 2015 --

1845 - Franz Reiger builds Opus 1 in the Castle Church near Jägerndorf
1845-1923 - Firm continues in family
1924 - Purchase of the firm by J von Glatter-Götz
1938-1945 - Second World War, firm built ammunition boxes
1945 - Expulsion following the Beneš Decrees
1946 - "Rieger-Orgelbau�: new beginning in Schwarzach/Voralberg
Firm active in 2015