Here are some links to a few photos taken with a 'new' 1953 Summaron 3.5cm f3.5. The camera was a Leica IIIf and the film Kodak Gold 200. This isn't a 'test', just some samples that show how a 55 year old lens performs in real life.
Disregarding the dubious quality of the film, developing and commercial scans, this tiny lens produces images which are sharp, well saturated and free from distortions. There is no vignetting, and the lens is really quite flare resistant. Apertures used were between f8 & f11, and while a degree of softness is visible in the outer areas of the image frame, overall the lens compares very favourably to my 35mm f2.8 AI Nikkor (which doesn't fit a Leica of course). It is apparent from the scans that the lens is capable of more detail than Kodak Gold (yuk!) can handle.