This is from the press release but watch this space for full specs and live photos coming soon
Overseas – Calibre 5100
Hours, minutes, seconds, date: this Overseas model displays essential functions with an aura of natural distinction. Nestled in a 41 mm-diameter case in stainless steel or 18K pink gold, the new Calibre 5100 entirely designed, developed and crafted by Vacheron Constantin is composed of 172 parts. It beats at the rate of 28,800 vibrations per hour and is endowed with a comfortable more than 60-hour power reserve guaranteed by its twin barrels (ensuring the constancy of the torque delivered to the regulating organ). The transparent screwed-down caseback reveals the precious 22K gold oscillating weight adorned with a wind rose. This timepiece certified by the Hallmark of Geneva adopts a sunburst blue or silver-toned dial, swept over by gold luminescent hands and hour-markers. Anti-magnetic thanks to the soft iron ring surrounding its movement and water-resistant to 150 metres, this model lends itself to all occasions with its three interchangeable bracelet/straps: a stainless steel bracelet with an easy-fit sizing system; as well as two straps in rubber and leather respectively. The latter are supplied with an equally adjustable stainless steel folding clasp. The pink gold version is fitted with a leather strap and comes with a second rubber strap as well as an interchangeable pink gold folding clasp.