John Powell
Yacht designer
Models
1
Years active
1964
Length overall
6.6–6.6 m
(21–21 ft)
Hull types
1 mono
Models
| Model | Years | LOA | Hull | Builder |
|---|---|---|---|---|
| FOUR 21 | 1964 | 6.55 m | Monohull | – |
Last updated 30 December 2025