The origins of this organ remain quite unclear. It is possible that the world wars, during which it was not feasible to complete the ambitious projects that had been started, contributed to this uncertainty. Additionally, the Soviet era following World War II did not favor the preservation and development of the instrument.

There is currently no information available about the authors of the signatures seen in the images. This lack of documentation has further contributed to the mystery surrounding the organ's history and provenance.

Additionals:

https://www.orgcat.lv/andrupene_main.htm