Quote Originally Posted by Jim Noel
In the 30's we mostly used orthochromatic film and silver chloride contact printing paper,...........

Making contact prints from panchromatic film on enlarging paper containing bromide will not give you the 30's look even with all of the bleaching, insufficient fixing and other manipulations mentioned in this string.
Curiously, if one flips through the old magazines from the middle 1930s, there would be found a lot of advertisements for panchromatic film. Virtually all of the 35mm film from Dupont, Agfa-Ansco, Gevaert, and Kodak were panchromatic. The word "pan" was also found in the technical information which the published photographs were often found with. There were also a lot of filters mentioned in both the technical credits. Often the filters orange and green, as well as red, were mentioned.

Ortho film, as Gerald said, is sensitive up the green part of the spectrum. Its effect could be duplicated on pan film by using green, rather than blue filters.
A strong blue filter will likely mimick the grey rendering of blue-sensitive emulsions which were from an earlier era. DW Griffith, Mack Sennet and Charles Chaplin had their actors made up ghastly white as a necessity, because ruddy complexions would register dark and look unwashed when shot with blue sensitve film.

I believe it's still the lens/camera combination which counts more in the first step of making "old" pictures. I've loaded Tmax 100 and even TCN in old Ansco Cadet B2 box cameras, Zeiss Ikon folders, and old rangefinders with uncoated Tessar-type lenses and there is always a subtle element of "old" in them, even if the subjects shown are relatively modern.