This is tough to argue with so I won't. 🙂 In fact, this is the only lens I truly regret selling.
One thing about it that may or may not be important to you: it does give a much more "modern" rendition (to me, at least). In itself that's neither bad nor good just, perhaps, something to consider.
Again, hard to dispute. And, contemporary to your IIIg.
Another good opinion.
Hmm, you may have answered your question here.
There seems to be a bit of a pattern emerging. 🙂
Right now, the 50 I use and like the most is my '55 vintage Jupiter-8. When I do decide to replace it, I will be looking for a good condition Nikkor f/2 "sonnar."
I have owned and used a bunch over the years; FED 50, Industars 10 and 22, J-8, J-3, Canon/Serenar50 f/1.8, and a few I know I'm forgetting. I do currently own a seemingly decent Summar but it and the IIIa it came with are off being sorted and I've not used it enough to really know how well, or not, I like the photos from it.
Rob