The top pick for anyone shopping a replica of the Blancpain 5050-1130-52A is a build that copies the full-calendar Villeret layout at full scale: the same aperture shapes, a moonphase disc at six o'clock, applied markers, and a case that measures the same as the genuine reference in width, thickness, and lug curve. Every build below is judged on five things: dial fidelity, the movement and how the calendar actually works, case finishing, strap and clasp fit, and how honest the seller is with real photos instead of catalog scans.

Criterion 1: Dial Fidelity and Calendar Layout

The dial is where most replicas of this reference fall apart, because a full calendar has more moving parts to get wrong than a three-hand watch. A full calendar shows day, date, and month in separate apertures, plus a moonphase, and each window has a specific shape and position. Ask for a straight-on macro shot of the dial with the watch set to a real date, then compare it side by side with a published photo of the genuine reference. Look at whether the printed text sits on the correct lines, whether the markers are applied metal or flat printed shapes, and whether the moonphase disc shows a proper moon and star field instead of a generic blue circle.

Pros of a high-fidelity dial build

• Reads correctly at arm's length, which is where people actually see the watch
• Aperture edges are crisp and the date sits centered, not high or low in the window
• Hand shape and finish match the reference, so the watch photographs well

Cons

• Costs more, and sellers charge a premium for dial detail alone
• Even good dials can have slightly thicker printing than the original under a loupe
• Macro photos hide flaws, so you still need a video under natural light

Best for: the buyer who wears the watch with short sleeves and wants the face to hold up to close inspection.

Criterion 2: Movement and How the Calendar Works

Two replicas can look identical on the wrist and behave nothing alike inside. A proper full calendar needs a 29.5-day moonphase cycle and correctors that advance the day, date, month, and moon independently. Many budget builds use a day and night disc that flips twice a day instead of a true lunar cycle, and some link the calendar so that setting one function moves another. Ask the seller which base movement is used, whether the calendar module is a separate plate or part of the base caliber, and how the watch is set. A short video showing the date flipping, the moon advancing, and the pushers working on their own answers more than any spec sheet.

Pros

• Independent correctors make the watch usable, not just wearable
• Serviceable base movements can be repaired by a local watchmaker
• Better movements keep time closer to spec over months, not days

Cons

• Module-based calendars add thickness, which shows at the caseback and the wrist
• Repair options shrink if the module is a proprietary copy
• True moonphase gearing is the single most common corner cut

Best for: the buyer who plans to set and wear the calendar functions rather than leave the watch on one date.

Criterion 3: Case, Lugs, and Finishing

Check the contrast between brushed and polished surfaces, the curve of the lugs, and the crown size and engraving. Measure the case yourself with calipers when it arrives and compare against the dimensions the brand and auction houses publish for the reference. A replica that is a millimeter too thick or too wide wears differently even if the dial is perfect. Caseback engraving, screw alignment, and how the strap sits in the lug gap are all quick tells.

Pros

• A correct case profile makes the whole watch convincing at a glance
• Good polishing and brushing hold up to fingerprints and daily wear
• Correct lug width means standard straps fit without modification

Cons

• Hand finishing is labor intensive, so this is where prices climb
• Thicker cases sit higher on the wrist and catch on cuffs
• Water resistance claims are rarely tested, so treat them as marketing

Best for: the buyer who cares about how the watch wears under a shirt cuff and wants a strap-friendly lug width.

Criterion 4: Strap, Clasp, and Wearing Fit

An alligator-grain leather strap with a deployant clasp changes the feel of the watch more than most buyers expect. Ask for the strap width, the buckle type, and whether the clasp is branded. A pin buckle is simpler and easier to replace, while a deployant preserves the leather and sits flatter. Confirm the strap is not glued paper-thin leather, because that is the first part to fail.

Pros

• Deployant clasps reduce leather wear and give a cleaner profile on the wrist
• Standard widths let you swap in a better strap later
• Quick-release spring bars make daily changes easy

Cons

• Cheap deployants rattle and can open on fabric
• Branded buckles are a common area for sloppy engraving
• Thick leather on a thin case looks out of proportion

Best for: the buyer who wants an everyday watch and will replace the strap within the first year anyway.

Criterion 5: Seller Photos, QC, and Paperwork

Request dated photos of the actual watch, a video with the watch running, and timegrapher numbers if the seller has them. Stock images and factory renders mean you are buying blind. A seller who answers questions about the reference number, caliber, and dimensions in plain language is worth more than one who only posts glamour shots.

Pros

• Real photos let you catch dial and case flaws before payment
• Timegrapher readings show rate and beat error, not just a claim
• A clear return policy lowers the risk of a bad build

Cons

• Slow sellers often drop communication after payment
• No seller can provide brand service, since the watch is not genuine
• Water resistance and warranty claims are usually unverifiable

Best for: first-time buyers who need proof before they commit, and anyone spending enough that a return matters.

Which Build Fits Which Buyer

If dial accuracy matters most, put your budget into the face and accept a simpler strap. If you want the calendar to work like the real thing, prioritize the movement and confirm the moonphase cycle before you pay. If you wear the watch daily, spend on the case and clasp, since those decide comfort. Whichever route you take, treat any replica as a replica: it will not be serviced by the brand, and its value is in how it looks and feels on your wrist, not in resale.