According to the Guardian (when writing about the second Kent sale in 2009):
"On his death the Duchess was dropped from the civil list, and most of his money was left in trust to his children: the three-day sale raised £92,300."
From the Christie's catalog for the 2009 auction:
"Tragedy struck in 1942 when the Duke was killed as his plane crashed into a mountain in Scotland while he was serving for the RAF. Unfortunately his civil list did not pass to the Duchess but abruptly ceased, and he left most of his inheritance in trust for his children. While The Duchess was cared for by the Royal Family, she found herself needing to raise funds and in March 1947, five years after HRH The Prince George, Duke of Kent’s death, Christie’s held a three day auction of his property. The sale included English furniture, objects of art and porcelain and totalled £92,300. Such was the interest in the auction that The Daily Telegraph reported at the time that ‘I believe that the crowds of connoisseurs and sightseers trying to get into Christie’s this week to view the art possessions of the late Duke of Kent…. will have surpassed all previous records.’"