Jameson Bow Street 18 Year Cask Strength Irish Whiskey- Jameson Bow Street 18 Year Cask Strength Irish Whiskey - Special blend of rare pot still & grain Irish whiskeys produced at the Midleton distillery. Aged for 2 decades, these whiskeys are married together and spend their finishing period at the Jameson Distillery Bow Street. The rarest release & bottled once per year at cask strength. Whiskey, brand, Jameson Bow Street 18 Year Cask Strength Irish Whiskey.