Reservoir Watch Sonomaster Chronograph Modern RSV04.SN/136.SI.BA. RESERVOIR applies the measuring of sound to the measuring of time. The two retrograde hands of the new RESERVOIR Sonomaster Chronograph faithfully reproduce the hands of power measurements or VU meters from analog stereo amplifiers. A tribute to the human quest for a ‘pure’ sound, a musical exploration full of audacity and intensity. This bi retrograde (date and seconds at 120°) watch inaugurates the first chronograph model from RESERVOIR (central second, 30 minute counter at 12, hour counter at 6). The watch is powered by the new watchmaking caliber RSV Bi120: a manufacture bi retrograde chronograph movement, automatic mechanical winding, and column wheel (base LJP L1C0).