Kent, you might find the following thread interesting:
(there was a url link here which no longer exists)
I don't wish to demystify the subject, but I find the "vintage" look depends on many more components of the system, not just vintage lens plus well selected film. In my book an uncoated (5 cm) Elmar is vintage looking only when really pushed outside its comfort zone: when used wide open in flare-prone situations. Stopped down a little or a bit more, with a deep shade attached to a clean example and it will look just like other excellent lenses, it's a Tessar after all, a lens type I have enormous respect for.
Much of the vintage look in my opinion comes from the paper, the enlarging lens and the fact that exposure was often off a little. Today's excellent six-element EL lenses haven't hit the market yet by that time and not everyone had the money to buy a special (four-element) lens just for enlarging, so they used their Elmar also for that. If you'd like to mimic the look of the vintage enlargements from 35 mm negs that were slightly unsharp corner to corner, you need to take a step or two backwards in your EL setup.
Paper was different and this is apparent when there are vintage and contemporary enlargements next to each other. Today's MG IV's base is noticably brighter than vintage (bright base) papers and I didn't even mention those that had whites not unlike on tea-toned cyanotypes, out of the box.
Quite a lot of photographers liked to tweak the published developer formulas and a lot of film was processed in deep tanks, using replenished developers. MQ formulae were very popular, but so were the fine-grain ones based on PPD, glycin. You might find the books of e.g. Hans Windisch will have a lot on 35 mm technique of the day. And films were much slower. During the war, most photographers were not allowed to be picky, they used whatever was available.
On the other hand, well-made contact prints or moderate enlargements can and often do look modern, this is also why I'm a little confused what "vintage" actually means.
Although a lot depends on the materials, I think it's more rewarding to bend your usual materials to get a "vintage" look out of them.