This is the first mechanical automatic-winding watch with Sax-o-Mat caliber that incorporates such extensive perpetual calendar movement as well as a patented zero-reset mechanism. The zero-reset mechanism allows the small seconds hand to jump back to 12 once the crown is pulled.

The other unique characteristic about the date display is there is no need for resetting until 28th Feb 2100 due to its accuracy. The correction then just needs a simple push of the rectangular date corrector located at 10.

Its moonphase is also highly précised where its continuous movement will only require correction of its aggregated error about 122.6 years later.

Langematik Perpetual comes in two types of case, the platinum and yellow-gold. It uses flat sapphire crystal on its 38.5mm diameter case which has a crown with the same metal scheme. The caseback is transparent displaying the movement under a sapphire crystal.

For the platinum case, it has a solid silver dial with rhodium-plated Roman numerals in multiples of 1 up to 12 every 5 minutes. There is a printed minute track around the Roman numerals with a luminescent dot every 5 minutes.

The central hands are also rhodium-plated gold hands with luminescent. Similarly, the yellow-gold case also has solid silver dial but uses gold in replacement for these the rhodium-plated gold instead.

The straps can be the hand-stitched crocodile leather which has a clasp using the same metal scheme as the case. i.e. platinum case with platinum clasp and gold case with gold clasp.

This metal scheme concept also applies for the bracelet version straps. So it can be either total gold finishing or platinum finishing.