Early 2016 Glashütte Original introduced its caliber 36, a movement designed for stability and precision, while adhering to the codes of the brand. In late 2016 the 'base' three-hander was accompanied by two more complicated siblings: a panorama-date, and a moonphase + panorama-date, while the present perpetual calendar was added to the line-up in 2017.Compared to the earlier Senator Perpetual Calendar, with the new movement also comes a new display for the leap year indicator - a traditional hand instead of the dot at 12:00, and the dial no longer features Roman numerals all around.Reference 1-36-02-01-02-01 has an alligator strap and a pin buckle.Reference 1-36-02-01-02-30 has an alligator strap and a folding clasp.Reference 1-36-02-01-02-50 has an alligator strap and a short folding clasp.