This coin was not seen in cache Mastberget when Daggan1972 visited on February 6. As there have been geocoin thefts in Stockholm, I sent them an e-mail. Today I got an answer from the team [tove@norrman.net - my translation]: "We dug out the cache on Mastberget, hard to find due to the snow, but there was no coin. There was nothing more than the log book in the plastic box, so I'm sure it wasn't there. I'm sorry."
Let us hope it shows up later, maybe when the snow melts.