100.0

Mortiz Grossmann caliber 100.0 is a hand-wound movement with a power reserve of 42 hours. It consists of 188 parts including 17 jewels, of which 3 are done in screwed gold chatons. It features a shock-resistant screw balance with Breguet overcoil shaped after G. Gerstenberger. The 2/3 plate and frame pillars are made of untreated German silver. The bridges (/plates) as well as balance and escape-wheel cocks are manually engraved, including broad horizontal Glashütte ribbing, and three-band snailing on the ratchet wheel. Other notable features include the
 screwed, raised gold chatons, the separately removable clutch winder, the modified Glashütte stopwork with controlled backlash, and the adjustment with a Grossmann micrometer screw on the cantilevered balance cock.