But to my suprise there was some sort of high viscosoty lube/grease on the stem. I've talked to Fruktstund (the person i bought the keyboard from) and he assured me that he hadn't put any grease/lube on the stems.
The lubrication seems to only have been applied to the part of the stem that has the tactical bump. I've tried to take some pictures of the stem with my phone to illustrate... which turned out to be very hard. Anyhow, here's a few pics:

Perhaps this is the best picture, this is the spacebar switch (tactical grey) which also is lubricated (in the same way the others are):

In that pic you can clearly see the orange like grease.
This brings me to the question, was this board lubricated by Cherry or by Skidata, did Cherry use to lube their clear switches?!?
The board was made in 1994 as far as I can tell.