George S. Cuhaj & Thomas Michael 
Coins of the World: Pobjoy Mint 

'In this single, easy-to-use and affordable download you will find detailed descriptions, updated values in multiple grades, and high-quality illustrations of every coin issued by the Pobjoy Mint during the 20th century.
If 20th century coinage from Gibraltar, Isle of Man or Liberia your thing, this download is your key to successfully identifying and pricing cents, gulden, and ducat coins, among others.’