These were the first truly modern coins; the mass-production of coinage with steam driven machinery organised in factories enabled the achievement of standardized dimensions and uniform weight and roundness, something no counterfeiter of the day could hope to achieve. Boulton also pioneered special methods to further frustrate counterfeiters. Designed by Heinrich Küchler, the coins featured a raised rim with incuse or sunken letters and numbers. The high-technology of Soho Mint gained increasing and somewhat unwelcome attention: rivals attempted industrial espionage, while lobbying with the Government for Boulton's mint to be shut down.