Jürgen Ehrt, Restorer and publicly certified expert for antique watches and clocks
German Society for Timekeeping
Association of Restorers
IHK, publicly certified and audited expert until 2021
Research Project Peter Henlein –participation as technical advisor
Regulator with constant force(Echappement à force constante)
Experimental escapement, equation, annual calendar and bi-metal compensation system with mechanical measurement of temperature.