Bingley
Veteran
I did an unscientific comparison last spring, shooting some peach blossoms with a 1949 coated Summitar that had been cleaned and adjusted, and a 1947 coated Elmar 50/3.5 that is in great shape. The photos were taken using an Oly E-PL1. First, the Summitar:

Peach Blossoms Summitar by bingley0522, on Flickr

Peach Blossoms Summitar by bingley0522, on Flickr