Johannes Helsen
| Tip ambarcaţiune | An Design | Categorie |
|---|---|---|
| Helsen 22 | 1971 | Sailboat |
| Watkins 23 XL | 1973 | Sailboat |
| Helsen 20 | 1974 | Sailboat |
| Montego 19 | 1976 | Sailboat |
| Montego 20 | 1976 | Sailboat |
| International 21 | 1976 | Sailboat |
| Explorer 21 | 1977 | Sailboat |
| Montego 25 | 1980 | Sailboat |
| Sovereign 20 | 1982 | Sailboat |
Designeri de yachturi