Eva Bartok, the Hungarian-born film actress of the 1950's and 60's, died in August 1998 at St. Charles's Hospital in London. She was 72 and lived in London. Miss Bartok made nearly 40 films, including ''Operation Amsterdam'' with Peter Finch and ''The Crimson Pirate'' with Burt Lancaster. Miss Bartok had a daughter, Deana, in 1957, when she was married to the German actor Curt Jurgens, but in recent years she had claimed that the girl's father was Frank Sinatra. She said that Sinatra never acknowledged the claim. Born Eva Ivanova Szoeke in Kecs kemet, Hungary, on June 18, 1926, she was imprisoned in a concentration camp as a teen-ager and married to a Nazi, The Daily Telegraph said, adding that the marriage was annulled on the grounds of coercion of a minor. Her second husband, Alex Paal, was a Hungarian producer. She moved to London in 1948, where she met the director Alexander Korda and changed her name to Bartok. Her first film was ''A Tale of Five Women,'' produced by Mr. Paal, in 1951. The following year, she appeared in ''The Venetian Bird'' with Richard Todd. Her marriage to Mr. Paal broke up and she married Bill Wordsworth, a public relations man. That marriage fell apart while she was in Rome making her most famous movie, ''The Crimson Pirate,'' in 1952. She met the British aristocrat David Mountbatten, the 3rd Marquess of Milford Haven, at a London dinner in 1952. They embarked on a highly publicized relationship that lasted for several years. For a while, Bartok was in every magazine or newspaper holding a glass of champagne in one hand with David by her side - from Monte Carlo, Capri to fashionable society events in London, Their high profile relationship caused a scandal. Romaine, Marchioness of Milford Haven cited Bartok in her divorce petition. Miss Bartok met Mr. Jurgens when they made a movie together in Germany and her relationship with the marquess broke up. She and Mr. Jurgens married in 1955, but that marriage foundered a year later. In 1956, Miss Bartok said, she met Frank Sinatra at a party while she was in Hollywood making her first American film, ''Ten Thousand Bedrooms,'' with Dean Martin. Sinatra's marriage to Ava Gardner had broken up. Miss Bartok said she had a very brief affair with him. She gave up her career to spend three years studying with the Pak Subuh sect near Jakarta, Indonesia. She later taught its philosophy in a school she opened in Honolulu. In the last years of her life, she lived in a London hotel. She is survived by her daughter, who lives in Australia, and two grandchildren.