Blancpain Reviews · October 13, 2026
Blancpain Villeret 6654-3640-55B Review: A Blue-Dial Complete Calendar
A buyer-focused review of the blue-dial, red-gold Blancpain Villeret 6654-3640-55B, illustrated with four original archive photos and practical calendar, condition and service checks.
The Blancpain Villeret Quantième Complet reference 6654-3640-55B brings a blue dial and red-gold case to a traditional calendar display. The watch in these photographs is the leather-strap configuration, with Roman numerals, day and month windows, a serpentine date hand and a moon-phase display. It offers a different kind of luxury from the steel sports watches that dominate many collections: less about an instantly recognized bezel, more about reading the dial closely.
Four original photographs from Ron King’s owner archive illustrate this review. They show the same watch from the front, at a dial-detail angle, along the strap and from the crown-side case profile. Private records were used to confirm the full reference. The warranty-card overview is excluded from publication to protect identifying information. This is an editorial review, not an offer of this individual watch for sale.
The blue-and-gold combination
Blancpain introduced this blue-dial, red-gold Villeret configuration in its 2020 collection announcement. Its stepped bezel frames a dial with several layers of information, yet the display remains composed. The outer date scale gives the serpentine hand a separate route around the dial, while the two windows and moon phase occupy recognizable positions above and below the center.
The owner photographs show why neutral lighting matters. Reflections can make the blue appear pale, gray or much darker, and the polished bezel can look brighter than the dial. A buyer should ask for several unfiltered angles before drawing conclusions about color or surface condition.
There is also a useful contrast between the case and strap. The polished red-gold surfaces read as formal, while the dark blue leather softens the overall impression. The strap’s grain, stitching and flexibility deserve the same attention as the dial. A flattering frontal photograph does not show whether the strap is worn at its holes, separating near the lugs or stressed where it passes through the clasp.
A complete calendar, with an ownership routine
This is a complete calendar, rather than an annual or perpetual calendar. Blancpain’s own explanation says a complete calendar does not compensate for different month lengths and needs correction after months shorter than 31 days. That distinction matters if the watch is going to spend time in a rotation.
The dial makes the complication approachable: day and month appear in windows, the date is read from the central pointer and the moon phase supplies a separate visual display. Before buying, ask the seller to demonstrate each indication and the changeover. A photograph records one moment; it cannot establish that the mechanism advances consistently.
For an owner who changes watches frequently, the more practical question is how comfortable the resetting routine feels. Some collectors enjoy bringing a calendar watch back into alignment. Others prefer a simpler date display. Neither preference is wrong, but the choice should be made before purchase.
Under-lug correctors are worth inspecting
Blancpain places the calendar correctors beneath the lugs, where the user can operate them with a fingertip. This keeps the case side visually clean and gives the calendar a distinctive interaction.
The official 6654 instructions describe a secured calendar and moon-phase mechanism. They also give specific guidance for advancing multiple indications during the evening changeover periods. Follow the manual for the actual movement and configuration rather than applying generic instructions from another calendar watch.
During an inspection, have a qualified watchmaker demonstrate the correctors and confirm that each indication responds as intended. Avoid forcing a button that feels inconsistent. A clean case does not establish the health of the calendar mechanism, and an attractive price should not substitute for a functional demonstration.
Proportions and movement identification
Blancpain’s current page for 6654-3640-55B specifies a 40 mm red-gold case, 10.90 mm thickness, a sapphire caseback and 3 bar water resistance. The manufacturer currently lists automatic calibre 6654.4 with a 72-hour power reserve. Its 2020 announcement and the historical model manual identify the earlier movement as calibre 6654.
That difference should remain explicit when researching a pre-owned example. A current specification page describes the current production configuration. It does not, by itself, prove which movement revision is inside an older individual watch. Confirm the calibre through the watch’s documents, service records and a qualified examination.
The side photograph is useful for assessing the bezel, lugs and crown relationship. It cannot provide a physical measurement or prove that the case has never been polished. Look at symmetry, edges and transitions in person, preferably under light that reveals rather than hides wear.
Condition is a series of questions
Start with the dial and hands. Ask whether either was replaced, refinished or removed during service. Request images sharp enough to evaluate printing, markers and the calendar windows. Check that the windows sit neatly in the dial and that the indications are legible without unusual alignment problems.
Next, inspect the bezel and case from both sides. Polishing history should be disclosed, together with any significant dents or impacts. The aim is to understand the watch as it exists today, not to expect every pre-owned example to look untouched.
The leather strap and folding clasp are separate inspection items. Check the clasp action, attachment, screws or pins, and the strap’s underside. Ask whether the strap and clasp are original to the delivered configuration or later replacements. A replacement strap may be perfectly reasonable, but its description should be accurate.
Finally, request a meaningful service history. A date on an invoice is useful; a description of work performed is better. Calendar checks, timing, power reserve, seals and any replacement components belong in that discussion.
Water resistance and leather care
The original water-resistance specification is not a current test result for a pre-owned watch. Blancpain advises regular water-resistance checks and keeping leather straps away from moisture. Treat this combination as a watch that benefits from thoughtful care, rather than assuming its rating makes it suitable for every activity.
If water resistance matters to your use, obtain a recent test through an appropriate service provider. A photograph of a caseback cannot establish the condition of seals. Similarly, a pristine strap should not be treated as waterproof merely because the watch itself carries a stated rating.
Buying the reference rather than the description
“Blue Blancpain calendar” is not a complete identification. The full reference, case metal, dial execution, strap and clasp configuration need to agree with the watch in front of you. Compare the seller’s description with the manufacturer’s information, then reconcile the individual watch privately with its records.
Rallo’s buyer information explains the broader inquiry process. For a different approach to a complicated luxury watch, the Vacheron Constantin Overseas Chronograph review applies the same inspection method to a blue-dial sports chronograph. The Rallo Journal collects further reference and condition guides.
Verdict
The 6654-3640-55B is compelling because its information and design work together. The date hand, calendar windows and moon phase give the dial a reason to be studied, while the blue leather and red-gold case make the watch visually coherent.
Its appeal is strongest for a buyer who welcomes the calendar routine and takes condition seriously. Confirm the exact reference and movement revision, test the indications, inspect the case and clasp, and understand the service history. The photographs help identify the right questions; the individual watch still needs to answer them.
Primary sources checked October 13, 2026
Photography and rights
Photography: Ron King / Rallo Watches. These four original camera photographs come from Ron’s personal watch archive and depict the same blue-dial, red-gold 6654-3640-55B on its blue leather strap. Original camera metadata records Galaxy S24 Ultra capture on June 30, 2026. Public commercial reuse by Rallo follows Ron’s instructions to use his own photographs. The published files are compressed copies with location and other camera metadata removed; no watch features, dial color, case shape or bracelet were generated or replaced. No manufacturer gallery images, outside seller screenshots or AI-generated watch images are used.