Frank Jones had served in the Royal Navy for twelve years, but was wearing a Long Service and Good Conduct Medal; awarded for fifteen years' exemplary service. And the medal being worn was not that of the Royal Navy, but of the British Army.
When Frank gives Bob, a Russian speaker, a book as a present, he says that the Russian bookseller recommended it as a reliable translation. However, the book he hands him is a Russian language volume of work(s) by A.S. Pushkin, easily identifiable as such by the Russian Cyrillic letters on the cover, and Pushkin was a Russian poet who wrote in the Russian language. This makes the book a Russian original, not a translation.