Port of Leith Reserve Tawny Port is a truly exquisite product, sourced from Martha’s Family Estate in Portugal's Douro Valley. Martha’s Family Estate has been producing Tawny Port in the Douro Valley since the mid 18th century. Aged for 6 to 8 years, this Tawny Port has a unique russet colour and complex flavour, with vibrant red fruit and nutty undertones.