Franck Muller Grand Curvex Piano puts a 20-layer black enamel dial and a 170-hour hand-wound movement in a curved case
Franck Muller's Grand Curvex Piano pairs a 20-layer black enamel dial with no numerals to an in-house hand-wound Calibre 1700 that runs about 170 hours, in a curved 53.1 by 36 mm tonneau case from $30,447.
