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Model reference: 7920V/210A-B546
Vacheron Constantin Overseas Dual Time 7920V/210A-B546, a 41 mm steel Overseas with a black lacquered dial, a red-tipped second-zone hand and a day-night scale.
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About this watch
This is the Overseas Dual Time in 41 mm, reference 7920V/210A-B546, shown with a black lacquered dial built over a sunburst base. Vacheron Constantin’s own page for that reference describes a stainless-steel Overseas 12 mm thick, water-resistant to 150 m and antimagnetic, with a transparent sapphire case back, a steel bracelet on a triple folding clasp, and the self-winding calibre 5110 DT/2 inside it: 234 parts, 60 hours of power reserve, central seconds, hours, minutes, a second time zone with day/night indication and the date.
On the dial in these frames, the second time zone is the hand with the red tip, and the small printed scale near nine o’clock reads AM and PM for its day and night. The date sits in a counter above six rather than in a window at three. The gallery runs from the dial straight on, through the dial and bracelet at an angle, to the case flank and finally the sapphire back. Those frames settle the dial, its print, the markers and the bracelet; they cannot say which movement is fitted to the offered watch, what its case and bracelet are actually made from, which strap and clasp come with it, or what state its seals are in, so those questions belong in the message rather than in the copy.
The date on this dial is not an aperture cut into the surface but a small counter of its own above six o’clock, with the days printed in an arc and a slim pointer hand stepping across them. Putting it there clears the area around three o’clock for a baton marker and keeps the dial balanced on either side of the vertical line through the centre.
A counter also changes what you look at when the watch is set. Instead of glancing sideways at a window, you read a pointer against a printed scale, which takes a moment longer but holds up better against a dark dial. Whether that pointer steps cleanly from one day to the next, and how it behaves when the time is moved forward quickly, are things to ask about on the actual piece rather than assume from a photograph.
The hour markers are single tapered batons with pale filled centres and bright surrounds, and the hour and minute hands carry the same fill inside polished edges. Against the black lacquered surface, the contrast comes from that fill and from the way the polished outline catches light, not from a change of colour anywhere on the dial.
Two details complicate the reading. The red tip on the second-zone hand is the brightest thing on the dial and pulls the eye before either of the time hands, and the printed AM and PM scale shares the nine o’clock region with a baton marker, so the two sit close together in a photograph. Ask for the dial in daylight, straight on and again at an angle, to check that the fill reads evenly across every marker.
The frames show the crown on the flank between its guards, with a round element beside it carrying the Maltese cross, and the bracelet links meeting the case a short distance away. The flank is finished along the case rather than across it, so it reads differently from the flat surfaces above and below.
Which element moves the second time zone, which one steps the date, and whether the crown has more than one pulled position are all outside what a still photograph can show. On a dual-time watch that matters, because setting the other zone without disturbing the local time is the reason the extra element is there at all. Ask for the setting sequence to be demonstrated on video, on the watch being offered.
The last frame looks into the back of the watch: a sapphire window over the movement, the winding weight lying across it, and the case ring around the outside carrying engraved lettering, including the antimagnetic and 150 m markings. The bracelet is attached at the lugs on both sides in that same frame.
A display back shows shapes, not condition. You can see that there is a weight over the movement and a balance moving, but not how the watch keeps time, whether it has seen a service, or which movement is fitted to the piece you would actually receive. If those answers matter to you, they have to come from the seller for this watch, because a reference sheet describes the design rather than the object.
The 150 m figure and the antimagnetic wording belong to the published description of reference 7920V/210A-B546: a 41 mm stainless-steel Overseas, 12 mm thick with a sapphire back, rated to that depth and described as antimagnetic in the manufacturer’s own data. That is what the design is built for.
It is not a statement about the watch in these photographs. Seals, crowns and case backs are only ever as good as their last service, and nothing in a still frame tells you whether the gaskets are sound or when they were last checked. If you intend to wear the watch near water, ask what the water-resistance position of this particular piece is and whether any test supports it.
In the frames the bracelet leaves the lugs as a run of flat links, brushed on the faces with brighter bevels along the edges, and meets a case flank finished in a different direction from the case top. The join is close enough that no spring-bar end shows from the outside at any of the angles photographed.
This reference is designed around a bracelet that can be swapped without tools, and a second strap with its own folding clasp is normally part of how such a watch is supplied — but what accompanies the individual watch is a supply question rather than a design one. Ask what is included with the offer, whether the release mechanism has been used, and whether the bracelet and any spare strap are the ones intended for this case.
Specification
| Detail | Description |
|---|---|
| Model reference | 7920V/210A-B546 |
| Model size | 41 mm |
| Dial | Black lacquer over a sunburst base |
| Dial print | Maltese cross with Vacheron Constantin and Genève above the centre |
| Hour-marker layout | One tapered baton per hour, filled centre with a polished surround |
| Hand arrangement | Filled hour and minute hands, slim centre seconds, red-tipped second-zone hand |
| Date display | Counter above six with printed days and a pointer hand |
| Subdial layout | Single date counter above six; printed AM/PM day-night scale at nine |
| Bezel design | Stepped ring, notched at intervals, with brushed faces and polished edges |
| Colour combination | Black dial, silver-toned case and bracelet, red on the two pointer tips |
| Bracelet shown | Multi-link bracelet with brushed link faces and polished bevels |
| Clasp | Triple folding clasp per the reference data; not visible in the frames |
| Case back | Transparent sapphire back with engraved lettering around the rim |
| Movement (reference design) | Self-winding calibre 5110 DT/2, 234 parts, 60-hour power reserve |
Questions
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Six frames that answer more than a long description: daylight dial, bezel straight on, bracelet closed, clasp, case back and a short video of the moving parts.
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