cyclone3d...very brave to take one apart. I have a few of them.....I bought the 1957 83mm Takumar as a collector piece, basically thinking it was more of a novelty more than a lens that could stand up to today's quality. While it doesn't have the coatings I am surprised at the quality. For an f1.8 lens, it is so tiny and light.....
Here is the camera you would have purchased it with.....I was very lucky to have this one shipped from ebay straight to Eric for cleaning...
and it with k-7.....
The 83 is a little stiff focusing and Eric won't touch them. How difficult have you found it taking them apart?