Introduced in 2014, Calibre SH21 is a new design by Johannes Jahnke. It is produced by Synergies Horlogères with nine other suppliers in Switzerland. The name combines the initials of the producing company with the number 21, standing for “21st century” and indicating the newness of the design.
Calibre SH21 is a modular movement, with components designed to be interchanged with other future models. It is a double barrel movement with automatic winding, good for 5 days of power reserve when fully wound. The modular design makes it quite large and thick, but this is not out of place in modern watch cases. The movement is chronometer certified by COSC.