Whats the deck look like ?
If this is a flush deck and has about 40 'control lines' .... then probably an International SOLING ... an olympic class boat from 1972-2000. Today the Soling is a 'trainer' for 'match racing'; although, its still a very active 'fleet' racer. The key elements of a Soling in your pics are there: keel shape, that graceful spoon bow, that large stern counter and that well forward located deep rudder.The sail logo is a greek 'omega' - Ω www.soling.comwww.soling.com/indexmore.asp?IdArticle=1&Seccion=General%20Information&Lengua=EnglishWould be a 'find' if in decent shape.