Leica IIIc (1947)
Summicron f/2 LTM (1955)
This lens was built in the mid-50s, before ray-tracing algorithms made lens design much, much easier and cheaper. It’s also single coated, which makes lens flare and contrast much worse.
Honestly, I prefer the muted, unsaturated tones this lens produces to any modern 50mm. And it’s incredibly sharp too. Pretty incredible that, before computers, Leica engineers could make a lens that I vastly prefer over lenses made with all the modern technology we’ve developed in the last 50 years.