Sikorsky S-58 prototype anti-submarine helicopter desigmated XHSS-1 by USN. Four built. 
List of Operators of XHSS-1 |
| Years | Model | Org | |
|---|---|---|---|
| 1955/70 | S-58 H-34 |  US Navy | |
| 1956/76 | S-58 H-34 |  Armée de l'Air |
Global Distribution of XHSS-1 |
|
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| 58-1 scrapped 1965 | 1954 | 134667,LA,XN | |
| 58-2 w/o 1957 | 1954 | 134668,GR | |
| 58-3 scrapped 1957 | 1954 | 134669,B | |
| 58-4 | 1954 | 134670 |
