J. "Jopie" Helsen
Yacht designer
Models
1
Years active
1974
Length overall
6.1–6.1 m
(20–20 ft)
Hull types
1 mono
Models
| Model | Years | LOA | Hull | Builder |
|---|---|---|---|---|
| HELSEN 20 | 1974 | 6.12 m | Monohull | Helsen Yachts |
Builders of boats by J. "Jopie" Helsen
Last updated 31 December 2025