Tudor Black Bay

In short

The Tudor Black Bay is a mechanical dive watch introduced by Tudor in 2012, referencing the dial and case design elements of Tudor's 1958–1970s Submariner-era references (particularly reference 7923 and 7928). The Black Bay is defined by its large crown (oversized 'snowflake' option), pencil or cathedral hands depending on variant, 'snowflake' dial marker option, domed crystal, and a 41 mm case with a bidirectional or unidirectional bezel. It was among the first Tudor references to use an in-house manufacture movement — the MT5602 automatic (introduced 2015), developed from a base calibre supplied by the Swatch Group's ETA operation, subsequently refined into a fully in-house movement. The Black Bay revived Tudor as a serious watch brand after a period of relative dormancy in the collector market, and established an accessible price tier for heritage-aesthetic dive watches.

Quick facts

Type: Iconic Watch
Era: 2012-present
Origin: Switzerland (Geneva)

Tudor's 1950s Submarine Heritage

Tudor was established by Rolex founder Hans Wilsdorf in 1926 as a second brand offering Rolex case quality at a lower movement cost — Rolex would supply the case and bracelet, while Tudor used third-party ébauche movements. Tudor produced its own Submariner references from 1954, initially sharing tooling and case elements with the Rolex Submariner. The 1958 reference 7923 and 1960s reference 7928 featured distinctive dial markers: 'snowflake' hour hands (with a distinctive rectangular lume plot at the tip, resembling a snowflake shape when viewed at scale) and large triangular 12 o'clock markers. These dial elements became the visual anchor for the Black Bay revival. By the 1980s, Tudor had moved away from dive watches and toward quartz-dominated catalogues; the brand's horological significance declined until its relaunch circa 2008–2012.

Black Bay Design Decisions

The Black Bay's key design decisions are rooted in archival accuracy: (1) The domed acrylic or mineral crystal (depending on reference) references the plexiglass domes of vintage Submariners, rather than the flat sapphire now standard in dive watches. (2) The oversized crown (referenced as 'big crown') echoes 1950s Rolex/Tudor crown proportions. (3) The 'snowflake' hand option reproduces the 1970s Tudor hand shape exactly. (4) The matte black dial with applied markers references the original reference 7928 layout. The 2012 launch came in red bezel, burgundy, and later blue and black — each colour being a reference to historical Tudor Submariner bezel variants. Case dimensions (41 mm for the standard, 36 mm for the smaller 'small') are larger than the vintage originals (38–40 mm) but consistent with contemporary sizing preferences.

In-House Movement Development

The MT5602, introduced in the Black Bay in 2015, marked Tudor's first use of a fully in-house movement (developed with the Rolex group's manufacturing resources) in decades. The calibre has a column-wheel chronograph architecture (no chronograph in the three-hand Black Bay), a free-sprung balance with variable inertia (for more stable regulation), a 70-hour power reserve, and COSC chronometer certification as standard. The movement is also used in the Black Bay Chrono (with the MT5813 column-wheel chronograph module). The adoption of in-house movements repositioned Tudor from a Rolex satellite brand using commodity movements to a manufacture in its own right — a necessary step for its price-tier positioning relative to Swiss rivals including Tissot, Hamilton, and Longines.

Market Position and NATO Strap

The Black Bay is positioned as a value option relative to the Rolex Submariner — sharing elements of design heritage (Rolex group manufacturing, similar case architecture) while retailing at substantially lower price points. Tudor issues the Black Bay with a combination of bracelet and fabric NATO-type strap in the box — the NATO strap inclusion became associated with the watch in the market and is referenced in advertising. The Black Bay's positioning between high-end ETA-movement Swiss brands (Hamilton, Longines) and the Rolex Submariner attracted a market of watch buyers unable or unwilling to pay Submariner premiums. By the mid-2010s, the Black Bay had established Tudor as a first-tier brand in the collector community rather than a Rolex alternative for cost reasons alone.

Sources & further reading (3)

encyclopedia — accessed 2026-05-07
encyclopedia — accessed 2026-05-07
watch-reference — accessed 2026-05-07

Frequently asked questions

What is the relationship between Tudor and Rolex?

Tudor is a brand owned by the Hans Wilsdorf Foundation, the same foundation that owns Rolex. The two brands share the same holding entity, some manufacturing resources (case production, crown components), and distribution infrastructure, but are operated as separate commercial entities with distinct positioning. Tudor watches are sold through Tudor-specific authorised dealers and some Rolex ADs. Rolex does not own Tudor and neither owns the other — both are assets of the Hans Wilsdorf Foundation, which is a private charitable foundation registered in Geneva.

What does 'Black Bay' refer to?

Tudor has not published an official explanation for the 'Black Bay' name. It is generally understood as a reference to the heritage dive watch aesthetic — 'Black' referencing the original matte black dial and bezel, 'Bay' as a marine reference consistent with dive watch naming conventions. The name was new at the 2012 introduction and is not a direct reference to any prior Tudor model designation.

Is the Tudor Black Bay water resistant enough for diving?

The Tudor Black Bay is rated to 200 metres (20 bar) water resistance, which meets the ISO 6425 standard for dive watches. The unidirectional elapsed-time bezel is required by ISO 6425 and is present on the standard Black Bay. The 200m rating makes it suitable for recreational scuba diving; professional saturation diving requires ratings of 300m or higher. The Black Bay is primarily a lifestyle dive watch rather than a professional dive instrument.