Herbert McWilliams
Yacht designer
Models
1
Years active
1946
Length overall
4.3–4.3 m
(14–14 ft)
Hull types
1 mono
Models
| Model | Years | LOA | Hull | Builder |
|---|---|---|---|---|
| SPROG | 1946 | 4.27 m | Monohull | – |
Last updated 30 December 2025