Hey Terje. This is what I have on her norwegian history:

8.66: solgt til Gunnar & John Glasø, Kristiansund N / Åle for nkr.300.000. Omdøpt GNY.
(pr.66): brt:155
6x: P/r / v. Gunnar Glasø, Kristiansund N / Åle.
71: Gunnar Glasø, Kristiansund N / Åle.
3.74: solgt til Birger Bøe, Kristiansund N / Åle.
77: P/r Gny / v. Birger Bøe, Kristiansund N / Åle.
80: ommålt. brt:149
83: ombygd.
( ca.85: observert i kystfart i Haugesund )
8.86: solgt til Egil Arne Torhus, Halsøy i Vefsn / Åle.
89: solgt til ukjent eier i Angvik på Sunnmøre / Åle. Opplagt som fórlager ved oppdrettsanlegg. Forfallt.
(7.5.91: observert i forfallen tilstand i Kristiansund N )
10.91: solgt til Leif Karlsen, Ekkilsøy / Åle.
5.93: solgt til Nybruse AS, Berlevåg / Åle.

Please note that the years of sale doesnt quite cope with the ones you have. Mine is from Flaggbøkene, Skipet and Dag Bakkas coaster-book. Could I ask what your sources is?

I wonder if she still exists? I saw her trading abt. 1985 in Haugesund. She did not look to swell back then either.
Also I think its odd that the first owner in Kristiansund registered her with Ålesund as homeport. Maybe there is an owner inbetween?
On pics from the seventies she had one mast between two hatches with two booms. But when I saw her she had one mast up front, one hatch and one boom. I wonder if thats the rebuild in 1983?

I hope that Flemming sees this, regarding Svitzer.. :-)