OLD 3D MOVIES

You cannot do this directly on IMDb, sorry although there's at least one user list of some of them available at https://www.imdb.com/list/ls070096667/ Advanced title search can be used to find all 3D movies from 1950 onwards, however, some of these may have been converted to 3D later for (recent) 3D home video releases -- https://www.imdb.com/search/title/?keywords=3d&explore=keywords&title_type=feature&release_date=1950-01-01,1969-12-31&sort=release_date,asc -- we set the end date to December 1969 but you could adjust that in either direction. Hope this helps.