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39.5 mm
Photos appear once Duckworth Prestex approves image use

Duckworth Prestex

Big Date Automatic

$975In stock
Configuration

Last checked Oct 26, 2026

Strap: Brown, Black

View on Duckworth Prestex’s site ↗

From Duckworth Prestex

BIG DATE Coin Edge, Open Heart automatic A refined expression of traditional watchmaking, the Prestex Big Date Automatic Open Heart combines classical design with contemporary mechanical detail. The beautifully textured dial features a prominent big date display at 12 o’clock, offering enhanced legibility while maintaining a clean, balanced aesthetic. At 6 o’clock, the open-heart aperture reveals the beating movement within, adding depth and a sense of craftsmanship to the dial. Elegant blued hands contrast against the silver-toned guilloché-style surface, while applied Arabic numerals provide a timeless, highly readable layout. The polished case is paired with a hand-finished leather strap, available in classic black or rich brown, delivering a versatile look suited to both formal and everyday wear. Subtle detailing across the bezel and dial reflects Prestex’s heritage approach to design, combining vintage inspiration with modern execution. Powered by an automatic movement, the Big Date Open Heart is designed for those who appreciate mechanical watchmaking and understated sophistication. Key Features: Automatic self-winding movement Big date display at 12 o’clock Case dimensions. 39.5mm diameter by 14.50 mm depth. Open-heart aperture showcasing the escapement Textured guilloché-style dial Blued hands for enhanced contrast Polished 39.5mm stainless steel case Genuine leather strap (black or brown) Classic, heritage-inspired design with coin edge top and bottom Hardened mineral crystal front and back Water Resistance 3 ATM 'Splashproof' Now In Stock Available For Immediate Dispatch

Specifications

Details and photos come from Duckworth Prestex’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.

Case

Diameter
39.5 mm
Lug-to-lug
Not listed
Thickness
Not listed
Thickness incl. crystal
Not listed
Lug width
Not listed
Material
Not listed

Movement

Type
Automatic
Caliber
Not listed
Power reserve
Not listed
Functions
Not listed

Crystal and bezel

Crystal
Mineral
Bezel
Not listed

Water resistance

Rated to
30 m

Dial and lume

Dial
Not listed
Lume
Not listed

Strap

Strap
Not listed

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