The auction was held in London on 21 December 1932. For the most part the media concentrated on the most valuable and famous item: the Wittelsbach Blue Diamond, which failed to reach anywhere near the reserve price and was passed in. Vincent Meylan has a superb photo and more information in Christie's pp 316-17.
The Wittelsbach Blue alongside another jewel which was sold. The Wittelsbach is on the right.
One description of the tiara
Some history, makers and price realised.
According to this news report there were 36 briolettes in the tiara.
I would love to know what happened to this tiara.