Mortiz Grossmann caliber 100.3, is a hand-wound movement with date. It consists of 259 parts including 26 jewels, of which 3 are done in screwed gold chatons. It is fitted with a Grossmann balance and a later pusher for disabling the handsetting mode and starting the movement, while the crown at 10:00 allows the date to be adjusted in either direction. This Pillar movement with 2/3 plate and frame pillars is done in untreated German silver. The balance cock and escape-wheel cock are hand-engraved.