Baltany S4009H California Dial Manual Winding Watch — DLC, 44mm

Baltany S4009H California Dial Manual Winding Watch — DLC, 44mm

The Baltany S4009H is a 44mm manual-winding watch built around the Seagull ST3600 movement — a large-format caliber based on the ETA/Unitas 6497 architecture — presented in a DLC (diamond-like carbon) coated black stainless steel case with a buffalo leather strap. The dial is a classic sandwich California construction: a mix of Roman numerals in the upper half and Arabic numerals in the lower half, with fired blue hands and Swiss retro Super-LumiNova on all indices and hands.

At 44mm with a 24mm strap width, this is a large-format tool watch for buyers who want maximum wrist presence, a statement case finish and a manual-winding movement with genuine depth of character.

Key Specifications

The California Dial

The California dial is one of the most distinctive and collectible dial layouts in watch design — a split dial where Roman numerals occupy the upper half (XII, I, II, III, IV, V) and Arabic numerals occupy the lower half (6, 7, 8, 9, 10, 11). This produces a visually asymmetric, slightly unexpected dial that reads differently from standard all-Roman or all-Arabic layouts.

The origin of the California dial is associated with American military and naval watches from the 1930s and 1940s — designed to be readable in both the Roman-numeral tradition of formal watchmaking and the Arabic-numeral convention of field instruments. The combination creates a dial that is immediately legible under pressure while carrying the formal gravitas of the Roman convention in the upper register.

On the S4009H the California dial uses a sandwich construction — the numerals are cut out of a top layer of the dial, revealing a contrasting underlayer beneath. This creates raised, three-dimensional numeral profiles that cast micro-shadows at their edges and are visually distinct from flat-printed alternatives. The depth and crispness of a sandwich dial is significantly greater than a standard printed or applied California dial.

The DLC Case Finish

DLC — diamond-like carbon — is an amorphous carbon coating applied via plasma vapour deposition to the outer surface of the steel case. The result is a deep, uniform black finish that is significantly harder than standard PVD (physical vapour deposition) black coatings. DLC is rated at approximately 2,000–3,000 Vickers hardness — substantially harder than even the 600HV hardened steel used on the Baltany S4101 — making it the most scratch-resistant case finish available on any watch at this price level.

In practice, DLC retains its appearance through daily wear far longer than standard PVD black coatings, which are softer and begin showing wear through at contact edges (lug edges, crown, caseback) within months of regular use. DLC is the choice for buyers who want a black case that stays black.

The 44mm case diameter combined with the DLC finish gives the S4009H an imposing, instrument-like presence on the wrist. The 360-degree mirror polishing referenced in the product description is achieved on the case body before the DLC coating is applied — the DLC surface preserves the polished geometry beneath rather than adding texture.

Movement — Seagull ST3600 Manual-Winding

The Seagull ST3600 is a manual-winding mechanical movement based on the ETA/Unitas 6497-1 architecture — a large-format caliber originally designed for pocket watches and adapted for oversized wristwatches. It beats at 21,600 vph with 17 jewels and a power reserve of approximately 48 hours.

Key characteristics:

• Manual-winding only — no automatic rotor. The movement requires winding via the crown daily or every two days depending on activity and remaining reserve
• Small seconds at 9 o’clock — the sub-seconds display sits at 9, driven independently from the main time display
• No hacking — the seconds hand does not stop when the crown is pulled for time-setting
• Large movement diameter (36.6mm) — physically large relative to most modern watch movements, which contributes to the 44mm case requirement and is part of why this caliber is associated with oversized pilot and field watches

The ETA 6497 architecture that the ST3600 is based on is widely regarded as one of the most serviceable movement designs in watchmaking — its large size and straightforward construction make it easy to work on and parts are available globally.

To wind: turn the crown clockwise approximately 35 half-turns from fully depleted to fully wound. The crown resistance increases noticeably as the mainspring approaches full tension. Do not force the crown past this resistance point.

Fired Blue Hands

The blue hands on the S4009H are produced by the heat-bluing process — controlled heating of steel to approximately 290–300°C until the surface oxide layer reaches the thickness that produces a deep, even blue colour. This is a permanent colour treatment that cannot chip, flake or peel because it is the metal itself rather than a coating.

The fired blue against the California sandwich dial creates the three-colour palette of black DLC case, cream/ivory dial numerals and blue hands — a combination with strong visual hierarchy and immediate legibility. The blue hands are luminous-filled with Swiss Super-LumiNova retro colour — the warm cream-yellow GL Old formulation that reads as aged ivory in ambient light and emits a warm green in darkness.

Buffalo Leather Strap — 24mm

The 24mm lug width is unusually wide — most watches use 18–22mm. The wider strap is proportionally correct for a 44mm case and gives the S4009H a substantial, balanced appearance on the wrist. The buffalo leather has a naturally grainy surface texture that develops character through wear, consistent with the tool-watch character of the overall design.

Standard 24mm aftermarket straps are available but less common than 20–22mm options — worth noting before purchase if you anticipate frequent strap swaps.

Who Is the Baltany S4009H For?

The S4009H is built for:

• Buyers who specifically want a California dial watch — the mixed Roman/Arabic numeral layout is the primary purchase reason for this watch
• Anyone who wants a DLC black case as a genuinely durable alternative to standard PVD
• Collectors who want the manual-winding experience as a daily ritual in a large-format case
• Those drawn to the oversized 44mm format as a statement watch rather than a daily-wear piece

For a complete guide to California dial watches and how the S4009H compares to other options at this price level, read the California Dial Watch Buyer’s Guide on Jewelry Addicts.

For a manual-winding dress watch from Baltany in a more compact 38.5mm case, the Baltany S4092 Sector Dial uses the Seagull ST1700 at 9.3mm thickness — the slim manual alternative.

For a military automatic with a different large-case character, the Hruodland Big Pilot Turbine Watch is the comparison for buyers who want a big pilot watch statement piece.

How It Compares

vs. Yelang V1021 Pilot — The Yelang V1021 is a tritium-tube illuminated pilot watch. The S4009H is the California dial manual-winding alternative — different dial philosophy, similar tool-watch character.

vs. Hruodland Big Pilot Turbine — The Hruodland Big Pilot is a large-format automatic with turbine aesthetics. The S4009H is the manual-winding California dial alternative for buyers who prefer the classic pilot watch aesthetic.

vs. Seestern Military Pilot — The Seestern Military Pilot is a Type B pilot watch in a more conventional size. The S4009H is the larger, California dial option for buyers who want a more distinctive dial layout.

More from Jewelry Addicts

Exploring California dial watches, DLC cases and manual-winding pilot pieces:

• California Dial Watch Buyer’s Guide — everything you need to know before buying a California dial watch
• Baltany Watches — Full Collection — all Baltany models at Jewelry Addicts
• Yelang Watches — tritium-illuminated pilot watch alternatives
• Best Automatic Watches Under $200 — full roundup including pilot, field and oversized automatics

Product Parameters

Movement Type: Seagull ST3600 Manual Winding Mechanical Movement
Case Material: 316L Stainless Steel
Black Case Craft：DLC
Case Back Type: Screw-in Lock
Dial Diameter: 44mm
Dial Thickness: 12.8 mm
Glass: Synthetic Sapphire Crystal
Strap: Buffalo Leather Strap
Strap Width: 24mm
Strap Length: 23cm
Crown: Screw-in Lock
Waterproof:100M
Weight: About 105g

Product Details

The surface is hand-made, exquisite mirror polished, perfect figure, no dead ends in 360 degrees

Classic sandwich California dial,Fired blue craft hour and minute hands

Swiss retro color super luminous

Sapphire glass dial window
Sapphire glass back case, see-through back case design

Screw-in crown, CNC precision machining, more suitable for frequent winding operations of the watch movement

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