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I don't know what it is . It was about 30' , had a wood mast . And it was a double ender .

IMG_0318 by mark westi, on Flickr

Looks like this is it: https://sailboatdata.com/sailboat/finnsailer-35
Some of the google images show it saying "Finnsailer 35" on the side of the boat.
The 29 seems to have a more interesting lay out: https://sailboatdata.com/sailboat/finnsailer-29

Looks very Baltic/North Sea'ish.