1709/10-1783, Pinchbeck the younger, clock-maker; watchmaker, British Pinchbeck, Christopher 1709 - 1783
c1716-1788, active 1756-1788, mathematical instrument maker, English; British Troughton, John 1716 - 1788
1715 or 1716-1794, horologist; marine escapement and watchmaker, London, England, English Mudge, Thomas 1715 - 1794
1722-1765, discoverer of tungsten; mineralogist; chemist, Swedish Cronstedt, Baron Axel Fredrik 1722 - 1765