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Since we're on a roll with ID's, and before I make a merge....

Is Stina [2] atually Linda Thoren?!

close, but imho different model. (chin, nose, philtrum)

Nope. She was known as "Stina" though on a really early release "Triple X 10" (her first video), but her bust and build is very much more thin and petite verus Stina [2]. Linda has a recognizable crooked swedish smile, and her hair tends to be more straight and a brighter shade of blonde. She did work with Kullervo Koivisto though like Stina [2].

Here's a dvd of artwork clip of Linda with Sabina (circa Barcelona 1997), used on the back of Kristina Bellanova: Three Blondes


Here's dvd artwork of Stina on Nunnat pt 2, from 1995:


Edit:
Here's an interview with Linda Thoren that is highly interesting for anyone to read: https://www.rogreviews.com/26951/interview-linda-thoren/

In this interview she states:

Linda Thoren wrote: The first real, professional movie I was in was Private Triple X number 10 I think. We did that in France, just south of Paris.

Private says that Triple X 10 was released on 03/01/1996, meaning after Nunnat's release year of 1995, not able to match up for certain.