
1912
Johan Grönefeld sets up his watch-making workshop in Oldenzaal.
1940
Sjef Grönefeld, son of the founder, takes the helm.
2008
Start of the success story for Grönefeld Exclusive Timepieces with the tourbillon model Répétition Minute GTM-06.
2010
Launch of the One Hertz watch, reinvigorating the complication of the secondes mortes.