The sole survivor N612A was originally a K-2, but was upgraded to K-3 and then to K-5 standard. It was sold to Mexico in 1931 as XB-AHO and was flown by La Compania Aeronautica De La Sierra on routes from Parral to local silver and other mining operations in inaccessible territory. It carried equipment and personnel to the mines and valuable ores on the return journey. It was sold in 1939 for operations from Chihuahua. After becoming derelict, it was recovered using pack animals and is now maintained airworthy by the private Golden Wings Air Museum near Minneapolis Minnesota.