The last of 50 production HSL helicopters 'was kept at Bell until 1959, when it was used on a small Navy contract to test stability improvements.' Photo probably taken at Bell in Texas since an early Huey is seen. Dorsal fins had already been added to HSLs in 1953. 129877 is claimed to have become N74018, but that seems to have been a Bell 47. Photo from: San Diego Air & Space Museum
This photo was added on 12 August 2021, and has since been viewed 411 times.