Franck Muller Crazy Hours jumping-hour module

The base is an ETA 2892, typically in a high grade, with the Crazy Hours works mounted as a module above it. Franck Muller's house practice across the range is consistent and worth knowing: an ETA base, a platinum rotor, selected components upgraded, an in-house complication module, the Franck Muller name engraved and a Franck Muller reference number applied. So an FM caliber number is an FM DESIGNATION over an outside base — the same convention this catalog records for Hublot's HUB numbers and Hamilton's H-series — and an examiner expecting in-house architecture behind one will report a correct watch as wrong. What still matters most at the point of examination is what the mechanism DOES, because that is what a copy omits: at the hour the hand must jump instantaneously across the dial to the correct numeral, which is not the physically adjacent one.