Thanks to UFO 6M owner Filipe Messias for providing information.
Mainsail area: 11m2
Foresail area: 5.5m2

Thanks to Yvonne McGill for providing images and additional information.
According to to the designer, about 80 sets of plans were sold.
A fiberglass production version was introduced in 1978 of which approximately 100 were built.
Bilge keel and keel/cb versions were available but most were turned out with fin keels.

Transom arrangement for outboard up to 10 hp.
Thanks to Bill Hooper for providing all information about this yacht.

IOR 1/4 ton.

This model was advertised by the builder but it’s unknown (to us) if any were actually built.

STORTRISS MKI has standard trunk cabin with side decks.
STORTRISS MKII cabin extends to width of hull.
Also available with lifting keel.

Built in Finland. Little else is known.
More info. and photo promised.

Main sail area: 12.7 m2/137 sq.ft.
Génoa area: 12.8 m2/138 sq.ft.