Runs non stop for eight full days Understated character best describes the Madison Eight-Days wristwatch. Its striking, textured dial, with twin baton hour markers, cobble-pattern centre and discreet brush-finished features a large date at 2 o’clock. A power-reserve indicator between 7 and 8 o’clock keeps track of up the eight full days of energy provided by its hand-wound movement. And that is not just any movement – the Eterna Calibre 3510 has a serially coupled pair of spring barrels working in tandem to deliver 192 hours of power smoothly and efficiently thanks to the Eterna Spherodrive system.