Mabel Boll (December 1, 1893 – April 11, 1949), known as the "Queen of Diamonds", was an American socialite involved in the early days of record-setting airplane flights in the 1920s.

In 1934, Boll made headlines again as the "Countess de Porceri" in Nice, France, when her 27-year-old boyfriend Georges Chariot shot himself on her lawn.

[8] 1927 was full of publicity surrounding Charles Lindbergh winning the Orteig Prize for his non-stop flight from New York to Paris.

Walter G. R. Hinchliffe, publicly refused to fly if Boll was a passenger and instead, she flew to Rome, dropping a present to Benito Mussolini's son.

[11] Boll was known as a temperamental passenger, once injuring pilot Erroll Boyd with an Alligator handbag in flight for making a premature landing in bad weather.

On the other extreme, Amelia Earhart was chosen as a demure and capable pilot sponsored by George Palmer Putnam and Amy Phipps Guest.

[14] While Boll publicly announced her aspiration to be the first woman to fly across the Atlantic, Amelia Earhart was also in Newfoundland at the same time, along with the German Thea Rasche.

At the same time in relative secrecy, pilots Wilmer Stultz and Gordon were believed by the press to be preparing Byrd’s Fokker “Friendship” for his planned trip to the South Pole.

[16] Upon learning of successful flight by Earhart and crew, Boll returned to America, donating $500 to the Newfoundland airstrip for development.

By the time the aircraft arrived in late August 1928, the flying season was coming to an end and Levine was preoccupied with legal matters in the United States.

He renamed it to the "de Espírito Santo Agostinho" (ESA) and attempted a three-man transatlantic crossing record from Lisbon on September 13, 1931.