GrailAtlasAn independent reference for mechanical watches

Pennsylvania Tourbillon

RGM's flagship complication and the first serially produced tourbillon movement made in North America: a one-minute tourbillon cage, visible through a sapphire case-side window, built around an oversized escapement in the hand-finished, German-silver Caliber MM2. Offered in stainless steel, 18k gold, or platinum, built in Mount Joy, Pennsylvania.

Year introduced: 20101 reference

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Pennsylvania Tourbillon | Grail Atlas