This single-manual organ with a suspended pedal, crafted by J.K. Herrmann, appears to be "squeezed" between the loft and the low ceiling, requiring the longest pipes to be bent to fit. Despite this, the organ has remained almost entirely in its original condition. However, structural issues caused by a past fire have led to the ceiling partially resting on the organ pipes, posing a significant problem.

Inscriptions found within the organ indicate tuning work done in the years 1891, 1893, 1913, and 1935. The individuals responsible for the tuning in 1891 and 1893 are unknown, while F. Wickel and N. Kleins are noted as the tuners in 1913. A. Krāns cleaned and tuned the organ from March 24 to 27 in 1935.

Additionals:

https://orgcat.lv/bolderaja_main.htm