Most Jupiter-3 lenses are "less than perfect", cleaning marks usually listed as the main issue. The ones that are perfect were probably not used very much, the reason is they were not manufactured correctly and got thrown into a drawer. Those are my favorites, I have several. Conservation of inconvenience, most required several days of repair, substitution of parts, and trial-and-error alignment. Sometimes you get lucky and the lens was always used with a filter. I have one of those.
This is my 1953 KMZ Jupiter-3 with "less than perfect" front element. Lots of cleaning marks, some look like rub spots on the coating. Looking at it, might make you cringe. I had used the original focus mount from this lens for a Sonnar conversion, put it into the parts bin. I recently got a $30 focus mount that required LOTS (8 hours) of grinding, polishing, cleaning, and rebuilding. Careful optimization for close-up/wide-open. I had to grind the mount down 1 and 1/8 turns for the focus to drive the RF to infinity. In its original state, as built, infinity was at 5m. Also missing screws, and heavy corrosion. Lots of very fine sand paper, including 3M sheets used for fiber optics. I'd call it a User Condition now, was UG-.
For the results:
Wide-Open, close-up.
1953 J-3 remount, Wide-Open by
fiftyonepointsix, on Flickr
Full res on Flickr.
Tree Line- wide-open
1953 J-3 remount, Wide-Open by
fiftyonepointsix, on Flickr
Tree Limb, very tip. Focus is Spot-On.
1953 J-3 remount, Wide-Open by
fiftyonepointsix, on Flickr
Wide-Open again, close-up.
1953 J-3 remount, Wide-Open by
fiftyonepointsix, on Flickr
Bokeh Shot, wide-open. Focus on the near dark spot of the leaf.
1953 J-3 remount, Wide-Open by
fiftyonepointsix, on Flickr