Steelflier SF760S Bronze Automatic Watch — NH35, 42mm, CuSn8, 200m, Cushion Case

The Steelflier SF760S is a 42mm NH35 automatic dive watch in a CuSn8 bronze cushion case — a vintage-style case architecture with wire lugs, large fluted screw-lock crown, domed synthetic sapphire crystal at 34.5mm × 3.3mm, mixed-numeral gradient textured dial, Swiss Super-LumiNova C3 green lume on hands and markers, screw-in solid caseback, 200m water resistance, 106g with leather strap. Three variants: green, blue and brown gradient dials — all on leather strap only.

Key Specifications

Variants — Three Dial Configurations

SF760S-GR (green): A textured gradient green dial — the most distinctive and vintage-resonant choice. Green dials on bronze cases are one of the most collected colour combinations in affordable dive watches.

SF760S-BL (blue): Gradient blue — the most broadly appealing and contemporary configuration on the bronze case.

SF760S-ZS (brown): Warm brown gradient — the most cohesive with the bronze case metal, creating an all-warm tonal combination.

All three use the same leather strap. No bracelet or nylon option for this model.

CuSn8 Bronze Case

CuSn8 is approximately 92% copper and 8% tin — the same marine-grade bronze alloy used in the Heimdallr 6105 Bronze and Steeldive SD1949S. It is harder and more corrosion-resistant in saltwater environments than lower-tin bronze alloys.

Patina: Bronze develops a natural surface oxidation over time — the bright copper-brown of a new case gradually shifts through darker brown, amber and eventually towards olive-green tones depending on skin chemistry, environment and wear frequency. The patina is unique to each watch and develops differently on each wearer. It can be slowed by cleaning or reversed by polishing, but most bronze watch buyers choose to let it develop naturally.

Cushion Case with Wire Lugs

The cushion case (rounded square with curved sides) combined with wire lugs (thin rod-style lug attachments rather than integrated case lugs) creates a specific early-20th century dive watch character. Wire lugs are associated with 1940s–60s professional dive watch design — they allow the strap to flex more freely from the case than solid lugs and create a visually lighter connection between case and strap.

The large fluted crown at 7mm diameter is sized for operation with wet or gloved hands — consistent with a dive specification watch.

Domed Sapphire Crystal

The SF760S uses a domed (convex) sapphire crystal at 3.3mm thickness — the deepest sapphire in the Steelflier range. The dome creates the characteristic curved vintage watch profile and the magnification effect at the dial centre. At 3.3mm the crystal is thick enough to contribute meaningfully to the 200m pressure resistance.

Mixed Numeral Dial

The SF760S dial uses a deliberately irregular numeral system — Roman numerals at some positions, Arabic numerals at others and simple bars at the remainder, with a triangle at 12. This mixed layout references the heterogeneous dial conventions of mid-century professional watches where legibility took priority over typographic consistency. Each dial also has a textured gradient surface — deeper colour at the edges lightening toward the centre — adding depth to the vintage character.

Steelflier SF760S vs Heimdallr 6105 Bronze

Both are CuSn8 bronze NH35 200m dive watches at Jewelry Addicts:

Choose SF760S for the cushion case, wire lugs, domed crystal and vintage mixed-numeral dial. Choose Heimdallr 6105 for the round case, dual lume (C3+BGW9) and cleaner modern dial layout.

Who Is the Steelflier SF760S For?

The SF760S is built for:

• Bronze cushion case buyers who want the early diving watch case architecture with wire lugs
• Green dial bronze buyers specifically — the green-on-bronze combination is the most collected and distinctive variant
• Domed sapphire buyers who want the curved vintage crystal profile rather than a flat modern crystal
• Steelflier range buyers who want the brand’s bronze offering to complement the stainless steel models

How It Compares

vs. Heimdallr 6105 Bronze — See comparison table above. Both CuSn8 NH35 200m — different case shapes and dial characters.

vs. Steeldive SD1949S Bronze 1000m — Steeldive is CuSn8 square 45mm/1000m on rubber strap. SF760S is CuSn8 cushion 42mm/200m on leather. Both are bronze extreme-vintage-character divers — different water resistance and case format.

vs. Steelflier SF783 Steel — SF783 is 316L steel at 41mm with ceramic bezel. SF760S is CuSn8 bronze at 42mm with cushion case. Both NH35 200m — material and aesthetic are the key choice.

More from Jewelry Addicts

• Heimdallr 6105 Bronze — round bronze NH35 200m alternative
• Steeldive SD1949S Bronze 1000m — square bronze extreme-diver
• Steelflier SF783 NH35 — stainless steel Steelflier alternative
• Best Automatic Watches Under $200 — full roundup