Speake-Marin 424211250 Openworked Tourbillon Red Gold 42mmSpeake Marin 424211250 Openworked Tourbillon Red Gold 42mm The new SMA05 v1 Calibre is part of the SMA proprietary movement family and follows the Openworked collection construction approach with a strong element at 1: 30: the flying tourbillon. By displaying a Tourbillon cage at 1: 30, Speake Marins goal is to break away from the traditional watchmaking codes: Speake Marin is the only watchmaker who positions its tourbillon there. Limited Edition: 10