Drie Fonteinen Oude Geuze is one of the oldest beers in their portfolio. Bottles dating as far back as 1959 have been opened and shared among lambic drinkers. Old bottles with no labels have corks stating "Debelder", indicating the brewer. During the years preceding 1999-2000, 3 Fonteinen Oude Geuze had been produced by blending other producers' lambic. After Armand leased a computerized brewing system in 1998 and began producing his own lambic<ref name=“LambicLand”>Tim Webb, Chris Pollard, Siobhan McGinn, [[Books#LambicLand: A Journey Round the Most Unusual Beers in the World|LambicLand: A Journey Round the Most Unusual Beers in the World]], 2010</ref>, subsequent blends contained both lambic from Armand as well as from other producers. It is unclear if 3 Fonteinen Oude Geuze was ever bottled using Armand's own lambic exclusively. In 2009, a failure of the climate control mechanism resulted in a massive loss of product. This huge financial loss, coupled with the fact that the lease on the brewing system was expiring, meant that no more lambic would be brewed at 3 Fonteinen for the foreseeable future.
To get the brewery back on its feet, Armand released a serious of special geuze blends to raise capital to acquire new brewing equipment. In the time between 2009 and late-200132013, 3 Fonteinen Oude Geuze was a blend of lambic from [[Brouwerij_Boon|Boon]],[[Brouwerij_Lindemans|Lindemans]], and [[Brouwerij_Girardin|Girardin]], with Girardin only being used through 2010. By 2013 , the new brewing equipment was in place and Armand began brew again. The first batch of 3 Fonteinen Oude Geuze to contain a portion Armand's lambic after the thermostat incident was bottled on 11/27/2013.
There have been several labels for 3 Fonteinen Oude Geuze over the years. The white label documented below was used in the 1990s and early 2000s for both the US and Europe. It notes that the beer won the O.B.P Trophy (Objective Beer Tasters) in 1993. 3 Fonteinen has also used neck labels on occasion (pictured below) for larger-format bottles.