To celebrate the 40th anniversary of their brewery, in 2015 Frank and Jos Boon created a special, limited edition of their historic Oude Geuze. Produced with a selection of Lambics fermented in ancient oak barrels (foeders), it is characterized by a very high degree of fermentation (almost 100%), which makes it particularly dry, but with a full body. Amber yellow with a fine and compact head. Aroma with hints of leather, wood, and iron. Taste rich in fruity notes with hints of pink grapefruit and lemon.