Name: Breitling Superocean Heritage '57 A10370A71L1X1
Brand: Breitling
SKU: A10370A71L1X1

The Superocean Heritage B20 42mm is Breitling's vintage-inspired dive watch, pulling design cues from the original 1957 Superocean with a broader bezel and period-correct chapter ring dial. It runs the Tudor-sourced MT5612, which Breitling rebadges as the caliber B20, and that provenance is either a selling point or a dealbreaker depending on who you ask. For buyers who care more about the movement's actual performance than whose name is on the rotor, this is a well-finished, honest watch at a price that reflects real-world demand.

What it is

Breitling launched the Superocean Heritage II line in 2017 and introduced the B20-equipped Heritage 57 variants around 2020, coinciding with the brand's deeper partnership with Tudor parent LVMH-rival Rolex Group -- specifically Tudor SA. The B20 is a direct derivative of the MT5612, a COSC-certified movement with a 70-hour power reserve and silicon hairspring. Breitling offered the 42mm in steel with multiple dial and strap combinations, including rubber, leather, and the mesh bracelet.

The 46mm shares the same movement but targets a different buyer; the 42mm is the more versatile size and sees broader collector interest. Production is ongoing as of 2025.

Buying notes

Verify the reference code carefully: the A10370 series covers multiple dial colors and strap configurations that carry different secondary values, so confirm you are buying the specific variant you want before comparing prices. Early examples occasionally show screw-down crown wear if the previous owner was careless about diving with it; test water resistance before any actual submersion. The Tudor movement connection means some grey market dealers mislabel these as having "in-house" movements, which is misleading -- know what you are buying.

Bracelet end-link fit on early production runs has been noted as slightly loose; check for play before purchase. The ceramic insert is scratch-resistant but not indestructible, so inspect it under good light for chips near the 12 o'clock lug area where handling damage concentrates.

Market read

New retail runs around $4,500 to $5,000 USD depending on configuration. Grey market sits roughly 20 to 25 percent below that, making this one of the more accessible Breitling sport references right now. The Tudor movement provenance suppresses secondary value relative to what comparable Breitling in-house models fetch, which actually benefits buyers: you are getting a COSC-certified, silicon-regulated movement in a well-built 42mm dive watch at a genuine discount to collector sentiment.

Do not expect strong appreciation; buy it to wear it.

Service expectations

The caliber B20 (Tudor MT5612) is a robust movement with a manufacturer-recommended service interval of approximately 7 to 10 years under normal use. Breitling service pricing typically runs $500 to $800 for a full overhaul at authorized service centers; independent watchmakers familiar with Tudor movements can service this for less since parts availability is good. Keep water resistance testing current if you use it for diving.

Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.

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Top-tier supplier movement · caliber Breitling Cal. 10: ETA 2892-A2 / Sellita SW300-1 base, Breitling-modified, 28,800bph, 42h PR, 25j; COSC-certified; used in Superocean Heritage 57 · 42h power reserve

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

42 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

Cal. 10 is a Tudor MT5612 derivative by design; do not mistake the movement architecture for a swap.

Known issues in the market

The Cal. 10 shares its architecture with the Tudor MT5612 due to a co-development agreement; buyers expecting a wholly proprietary Breitling movement will be surprised, but this is correct.
METAS certification applies to the complete watch; verify METAS documentation accompanies the watch at purchase if claimed.

Area	What to check	What is correct	Red flag
caseback	Cal. 10 movement architecture	Movement architecture resembles the Tudor MT5612 with Breitling signing; this is intentional and correct for the Superocean Heritage 57	Unsigned movement or a movement that does not resemble the MT5612 family, indicating a non-original caliber
dial	Vintage-inspired dial printing and indices	Applied indices and vintage-style printing consistent with the Heritage 57 reference; lumed markers properly aligned	Modern-style dial printing inconsistent with the vintage revival aesthetic; misaligned or poorly applied indices
case	Unidirectional bezel operation	Bezel rotates counterclockwise only with crisp clicks; clockwise rotation blocked	Bidirectional rotation or soft clicks indicating a worn or damaged bezel mechanism

Common legitimate replacements

METAS certification paperwork is part of the value proposition; missing documentation should be reflected in price.

Expert resources: Breitling Superocean Heritage documentation at breitling.com. WatchUSeek Breitling subforum for MT5612 architecture identification.

Authentication guide

Last reviewed June 2026

The Superocean Heritage '57 is a 1957 aesthetic reissue with a waffle-texture dial and a caseback medallion specific to the Heritage '57 series. It runs the Cal. 10, which is a Tudor MT5612-derived movement finished and certified by Breitling. The waffle dial texture and the correct caseback medallion are the fastest authentication points.

Known reproduction risks

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MEDIUM

Replicas typically miss the waffle dial texture, substituting a smooth or conventionally textured dial surface, and use aluminum bezels rather than ceramic.

Dial without the waffle-grid surface texture characteristic of the Heritage '57
Bezel insert that accepts scratch from a key
Caseback without the Heritage '57 series medallion
Breitling "B" logo on the dial at incorrect scale or placement

The waffle texture is the fastest field tell. Any Heritage '57 presented with a smooth dial is not correct production.

LOW

Standard Superocean examples without the '57 designation presented as the Heritage reissue.

Dial without the waffle texture that defines the Heritage '57
Caseback without the '57 series-specific medallion
Reference number on the case band inconsistent with A10370 or the current production reference

Dial variants by era

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Era	Description	Identifiers
Heritage '57 current production (2020 to present)	42mm round case with vintage-inspired proportions, waffle-texture dial, unidirectional ceramic bezel, date at 3.	Waffle-pattern dial texture: a grid of raised squares covering the dial surface, visible to the naked eye and very pronounced under loupe Breitling "B" logo applied at 12 o'clock "SUPEROCEAN HERITAGE" text on the dial in the correct Breitling typeface "'57" designation on the dial indicating the 1957 reissue lineage Large applied luminous indices with a vintage proportion relative to the dial Date window at 3 o'clock with correct font Unidirectional rotating ceramic bezel with 60-minute scale

Service part flags

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Waffle-texture dial

Original: The waffle texture is the defining visual feature of the Heritage '57. It is a mechanical surface treatment applied during dial manufacturing, not a print or coating. Under loupe, the grid squares have consistent depth and clean edges. The texture runs to the edge of the dial under the applied indices.

Replacement tells

Dial surface that is smooth or conventionally brushed rather than showing the waffle grid pattern
Grid texture that appears printed or superficial rather than having genuine dimensional depth under loupe
Grid squares with inconsistent size or irregular edges indicating a lower-quality texture process
Applied indices that sit on the texture without appropriate surround -- genuine indices sit flush with consistent spacing around their bases

Ceramic bezel insert

Original: Zirconia ceramic insert with laser-engraved minute markings. The ceramic resists scratching from keys or standard metal tools. The bezel rotates counterclockwise only with positive click stops.

Replacement tells

Bezel insert that accepts scratches from a key -- ceramic does not scratch; aluminum does
Bezel with bidirectional rotation: the Heritage '57 bezel is unidirectional only
Numerals on the insert that appear printed on the surface rather than laser-engraved into it
Insert with any play relative to the bezel ring -- the insert is adhesive-set and should be immovable

Cal. 10 movement

Original: Cal. 10 is derived from the Tudor MT5612, modified and COSC-certified by Breitling. It is automatic at 28,800bph with a 70-hour power reserve. Through the caseback, the movement should show Breitling signing and the movement architecture consistent with the MT5612 base. There is no in-house Breitling architecture here; the movement will look similar to a Tudor movement.

Replacement tells

Movement visible through any exhibition caseback that shows Cal. B01 or B17 bridge geometry -- Cal. 10 has a different layout
Rotor without Breitling branding or signed for a different brand
Movement with power reserve substantially below 60 hours from a fully wound state

Caseback medallion

Original: The Heritage '57 has a series-specific caseback medallion with design elements referencing the 1957 original. The medallion is a separate element applied to the solid caseback, not embossed into the caseback itself. The detail should be crisp and consistent under loupe.

Replacement tells

Generic Breitling caseback without the Heritage '57 specific medallion
Medallion with blurred or indistinct detail under loupe -- correct caseback detail is sharp
Medallion that is embossed into the caseback rather than being a separately applied element

Case back markings

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2020 to present

Solid caseback with Heritage '57 series-specific medallion
Reference A10370 (or full reference string) on the case band
"Swiss Made" and COSC chronometer text
"Breitling" in correct typeface on the caseback
Serial number between the lugs on the case band
Water resistance rating: 10 ATM / 100M

Movement tells

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Cal. 10 is COSC-certified at -4/+6 seconds per day. A timegrapher check should confirm this; significant deviation warrants service.
The 70-hour power reserve is testable. A fully wound Heritage '57 should run a minimum of 60 hours.
Cal. 10 shares architecture with the Tudor MT5612. The balance wheel regulation can be confirmed by any watchmaker familiar with Tudor movements.
The date change should be instantaneous at midnight. A gradual or two-step date advance indicates a worn quickset mechanism.

Sources: Breitling -- Superocean Heritage '57 specification and Cal. 10 documentation; Fratello -- Breitling Superocean Heritage '57 review (2020); WatchUSeek -- Breitling authentication forum.