Niels C. Helleberg
Niels C. Helleberg was a naval architect located in United States of America.
| Modello | Anno di progetto | Categoria |
|---|---|---|
| Alden 43 | 1992 | Sailboat |
| Alden 44 | 1976 | Sailboat |
| Alden 45 | 1992 | Sailboat |
| Alden 46 | 1987 | Sailboat |
| Alden 48 | 1987 | Sailboat |
Progettisti