Bulgari
generalDate code & serial
Bulgari marks jewellery with the 'BVLGARI' brand name (Latin V for U), a metal/purity mark (e.g. 750 for 18k gold, 950 for platinum), a country-of-origin line ('MADE IN ITALY' for jewellery), and a unique serial/identification number placed discreetly on the piece; rings additionally carry the ring size stamped inside the band. Serials are typically laser-engraved rather than deep-stamped. Watches carry a reference/model number and a unique serial engraved on the caseback (or between lugs on some models) alongside a Swiss-made origin indication (Bulgari watches are manufactured in Switzerland). Newer pieces are tied to an International Digital Warranty & Authenticity Card whose NFC component is linked in-store to the engraved serial. There is no publicly documented decode grid for the serial format, so treat any claimed serial-to-date/factory decode as unverifiable.
What to checkConfirm the full hallmark set is present, cleanly and evenly engraved: 'BVLGARI' spelling with the Latin V, a metal/purity mark, origin line, and a crisp serial. On watches, check that the caseback reference and serial are sharply and evenly engraved (not printed or shallow) and that they match the warranty/authenticity paperwork and digital card exactly. On rings, verify a real size stamp inside the band. Do NOT authenticate on any single serial format claim - cross-check the serial against Bulgari's own records/boutique or the linked digital card rather than a supposed decode chart.
Red flags & tells
Misspelled or wrong-font brand mark
reliableThe house spells the name 'BVLGARI' with a Latin V in place of the U. A mark reading 'BULGARI', or with uneven, mushy, or inconsistently spaced letters, is a strong negative signal - genuine hallmarks are clean, sharp and evenly spaced. Note: 'Bulgari' with a U is the correct anglicised spelling in prose/marketing, so the U only counts as a flag when it appears in the engraved metal hallmark itself.
Shallow, printed, or mismatched serial/reference
reliableOn watches the caseback reference and serial should be cleanly and evenly engraved. Shallow, printed, or unevenly spaced numbers, recycled/duplicate serials, or any mismatch between the caseback and the warranty/authenticity paperwork or digital card are major concerns.
Rigid Serpenti with no articulation
generalSerpenti bracelets/watches are built from individual scale-like links that flex and coil around the wrist; a piece that is one solid rigid section or articulates at only a few hinges runs against the genuine construction. Treat as a prompt to inspect closely, not an automatic verdict - some Serpenti forms (e.g. rigid bangles or ring variants) are legitimately less flexible.
B.zero1 multi-band with no 'give'
generalDouble-, tri- and quad-band B.zero1 rings are built as a spiral that gently compresses and springs back under light pressure. A multi-band ring milled from one grooved solid piece with no flex is inconsistent with the genuine build. Important: single-band B.zero1 variants exist and are legitimately rigid, so absence of flex is only meaningful on a piece that should be multi-band, and is never conclusive on its own.
Missing or non-matching size stamp inside a ring
generalGenuine rings carry their size stamped inside the band. A random unrelated number, or no size marking at all, is a flag - though wear or professional resizing can affect this, so weigh it with other tells.
Wrong caseback closure or screws for the reference
generalSome genuine Bulgari watches use a screwed caseback with slotted or specialised screws; others legitimately use snap-on backs. A closure or screw type that does not match the specific reference points to low-cost manufacture - but you must verify the correct configuration for that exact model first, since it varies across the range and good fakes now copy screwed backs.
Suspiciously light weight or off finishing
generalBulgari uses solid precious metals (18k gold, platinum, silver, steel) and pieces have real heft plus smooth lines and even edges. A piece that feels oddly light or shows rough edges, pitting, or plating wear warrants scrutiny - but weight alone is never decisive across different sizes and metals, and superfakes now use real precious metal.
The honest caveat
Reference guidance only - general assistance for a human authenticator and rule checks, NOT a standalone verdict. Sources cross-checked against Suttons & Robertsons, TrueFacet, TheRealReal, myGemma, 1stDibs, LegitGrails, and Bulgari's own brand-protection and digital-warranty material. CAVEATS: (1) Bulgari's marking conventions, origin wording and packaging have changed over time and vary by production era, collection and market - an older genuine piece may lack the newer NFC digital card or use different wording. (2) Superfakes increasingly replicate the correct BVLGARI spelling, plausible serials, screwed casebacks, real precious metal, and convincing scale articulation, so no single tell (spelling, weight, flex, a matching-looking serial) is dispositive. (3) Do NOT rely on any claimed serial-format decode chart - the internal format is not publicly documented; verify serials against Bulgari records, a boutique, or the linked digital authenticity card instead. (4) The B.zero1 'flex test' is a soft corroborating signal, not a rule: single-band references are legitimately rigid, and circulating claims that a genuine multi-band ring must compress a specific number of millimetres (or 'it's fake') are not a reliable standard. (5) Avoid absolutes such as 'authentic always weighs X' or 'genuine is never made outside Italy' - jewellery origin, watch origin (Swiss) and weight legitimately vary. Confirm through multiple corroborating signals plus provenance/paperwork.