Yes, multiple times like I said before:
1982, 1995 (value 1,8 million EUR), 1999 (again value 1.8 million EUR), 2000 (value 6,25 million EUR), 2001, 2005 and now 2013 though they didn't all include diamonds. Brinks was involved before.
However the largest robbery of diamonds happened in the Antwerp Diamond Center back in 2003 when officially a minimum of 100 million EUR in diamonds where taken. Unofficially the number was much higher. The diamonds were never to be found.
Apparently the BRU heist of yesterday has the dark honor to be the largest heist with an aircraft involved.
