I found a little info, finally. It appears that the films in the 1940's could have been shot on a variety of film stock, but by the 1950's most people had settled on Kodak Eastman Double-X 5222 and Kodak Eastman Plus-X 5231. All of the B&W movies that I enjoy on TV or DVD have obviously been converted to digital, and were cleaned up/sharpened, etc digitally. You still had to start w/ a film stock, of course. Shooting movies in digital and converting to B&W gives the same results that we get on our stuff here....bleah.
Today, the normal thing to do is to shoot on color stock (for film makers that can afford film), transfer it to digital to edit, then print the image back on color stock. For those that insist on real B&W film, the norm is to shoot B&W film, convert to digital to edit, then print on color film stock. This has 3 big disadvantages. The end result won't be as sharp or as high a resolution as a complete chemical process. It will always have some color tint no matter what you do. And you can't use filters while shooting, as you normally would w/ true B&W film stock. The people who shot Schindler's List on real B&W film, converted it to digital to edit, then printed that to real B&W film stock. This resulted in trouble during the movie's previews because today's projectors run too hot, and the film kept buckling and popping out of focus. The B&W film's high silver content made it run that much hotter. They were adamant about using real B&W film though because it gave them superior IQ. The big disadvantage was that these 5222 and 5231 film stocks, unlike the color print films, haven't been improved since 1960, so no T grain, various ranges of film speeds, etc. Fascinating stuff.
I'm very interested in their remarks that the process that resulted in the highest IQ was still the oldest. IE, shoot on B&W film stock, do everything chemically, and skip the digital intermediate process. Apparently the scanning machines that they use are limited in terms of resolution, so a movie that's shot on B&F film, digitally edited, then transfered to B&W film stock is still inferior to a movie that's a total chemical print. But (there's always a but) you are at a disadvantage w/ editing capabilities, and you can't fix things like grain issues in bad light.
I have trouble getting ONE shot right. Imagine having to deal w/ tens of thousands of frames in a movie?