Analysis of information sources in references of the Wikipedia article "List of highest-grossing R-rated films" in English language version.
After its release, Enter the Dragon became Warner Brothers' highest grossing movie of 1973. It has earned well over $400 million
Leading the pack of postwar sex hygiene films was Mom and Dad (1944), which would become not only the most successful sex hygiene film in history but the biggest pre-1960 exploitation film of any kind. At the end of 1947, the Los Angeles Times reported that Mom and Dad had grossed $2 million. By 1949 Time had estimated that Mom and Dad had taken in $8 million from twenty million moviegoers. And publicity issuing from Mom and Dad's production company indicated that by the end of 1956 it had grossed over $80 million worldwide. Net rentals of around $22 million by 1956 would easily place it in the top ten films of the late 1940s and early 1950s had it appeared on conventional lists. Some estimates have placed its total gross over the years at up to $100 million, and it was still playing drive-in dates into 1975...The film was made for around $65,000 with a crew of Hollywood veterans including director William "One Shot" Beaudine, cinematographer Marcel LePicard, and a cast that sported old stalwarts Hardie Albright, Francis Ford, and John Hamilton.
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