The new Richard Lange Minute Repeater operates like a fairly conventional if there is such a thing minute repeater. There's a sliding pusher integrated into the left-side
link caseband that engages the chiming mechanism once actuated the hours quarter-hours and minutes are rung in succession using a pair of gongs. The gongs are set to different pitches and operate off a mechanical program
link that can audibly indicate precisely 720 different sequences. FYI there are 720 minutes every
link 12 hours.