Keller-Organ (1875) in Usingen-Kransberg
Technically an "exotic" instrument with suspended valve and mechanical key action and pneumatic stop action.

Sauer-Organ (1892) in Loja, Ecuador
Mechanical cone-valve chest, carried to its destination across the Andes on men´s and donkeys´ backs.

Stumm-Organ in Hillscheid
The original disposition of Stumm´s main department was reconstructed keeping the enlargements by Voigt (1834,positive) and Zumsande (1862,pedalboard)

Walcker-Organ (1906) in Paysandú Uruguay
An instrument for the sylistically correct interpretation of Max Reger´s organ music - technically and musically in an almost perfect original condition.