Description
Carrying the same 5520V/210A-B148 designation, this Vacheron Constantin Overseas dual time focuses on the 42.5mm dual-time variant within the Overseas family. The larger case diameter separates it from the standard Overseas size, providing more wrist presence while retaining the integrated bracelet architecture and Maltese cross bezel. The dual-time complication adds a second hour hand and a day/night indicator at nine o’clock, oriented toward frequent travelers who need two time zones visible at a glance. Automatic winding maintains both displays without manual intervention.
Build Details
- Reference: 5520V/210A-B148
- Case diameter: 42.5mm
- Case material: stainless steel
- Case thickness: 12.67mm
- Bezel: Maltese cross pattern, fixed
- Crystal: sapphire with anti-reflective coating
- Movement: automatic dual time zone
- Genuine calibre: Vacheron Constantin Cal. 5200, column-wheel chronograph with vertical clutch, 54 jewels, 263 parts
- Power reserve: 48 hours (genuine Cal. 5200: 52 hours)
- Water resistance: 50m (genuine: 150m)
- Frequency: 28,800 vph (4 Hz)
- Geneva Hallmark: Poinçon de Genève on the genuine movement
- Functions: hours, minutes, seconds, date, second time zone, day/night
The 42.5mm case sits in the upper range for Overseas dimensions. Compared to the 41mm time-only references, the extra millimeter and a half accommodates the dual-time mechanism while also giving the dial more room for legible sub-displays.
What Collectors Notice
Dual-time Overseas references attract a specific buyer profile: those who value practical complications over decorative ones. The second hour hand snaps into position via a pusher at ten o’clock, which means adjustment happens without unscrewing or pulling the crown. That operational simplicity separates the Overseas dual-time from conventional GMT watches that require crown manipulation. The Overseas collection page shows how this model fits among its siblings. For a different take on the 5520V at this size, the green dial on rose gold trades the steel-and-blue combination for a warmer visual identity while keeping identical functions.
This vs Other Versions
The 42.5mm B148 and the standard-size B148 share the same reference number but differ in wrist impact. The larger case catches more light across its polished bezel facets and the dial feels less compressed, which improves legibility of the day/night indicator and date window. For those who find the 41mm Overseas slightly conservative, this version scales up without abandoning the design code that keeps every Overseas recognizable at arm’s length. This Vacheron Constantin Overseas dual time frames the dual-time complication in that expanded 42.5mm format.
Product description adapted from the authorised reference catalogue. Specifications in this description refer to the source listing; confirm details for your selected variant.












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