Celebrate a century of British Submarine history with our selection of stunning commemoratives that pay tribute to the true Assassins of the Deep. HMS Dreadnought was the first nuclear-powered submarine in the Royal Navy fleet. Commissioned into service in 1963, it was widely considered as the most formidable attack submarine in the world. The 24-carat gold plated commemorative shows the engraving of the iconic submarine, the reverse features the Royal Navy Submarine Service logo alongside their motto 'we come unseen'.