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.
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