I am old BW shooter. Mostly 35. Have trove of various medium format exposed film from parent, from 1940s and 50s, mostly in 120, some 620, Was kept in drawer by procrastinating parent, Shot mostly in Korelle camera and maybe film pack on back of 4x5 Graflex, May have couple rolls of oddball size from 30s/40s. Guessing the the film was exposed at standard ASA (ISO) designations. I think it is all Kodak film. Am thinking I should use a mild sort of devleper, but maybe not. For all I know film is shot. But, have to do it.... Been doing digital for some time and plan to devlop the film and if decent, scan and run prints. Any suggestions as to developer, etc from anyone. I must bow to the experience here. I have read the theads and am impressed with the experience.