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42 mm · 50 mm lug-to-lug
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Duckworth Prestex

Belmont 300 Automatic

Diver

Lugs stay on wrists from about 6.75 in (lug-to-lug rule of thumb)

$750In stock
Configuration

SKU D328-03 ST

Last checked Oct 26, 2026

Color: Blue, Orange, Green

Strap: Steel Bracelet, Black Rubber, Coloured Rubber

View on Duckworth Prestex’s site ↗

From Duckworth Prestex

The Belmont - Automatic Dive Watch The cushion-style case is constructed out of durable 316L brushed stainless steel and is water resistant to 300m . The fume dial and distinctive wave pattern distinguishes the Belmont, whilst the contrasting seconds hand and hour markers add a pop of colour to animate the look. The hour markers, hands and trainagular bezel marking are all highly visible in low light conditions. Inside the watch we have fitted the ever reliable and robust Miyota 9039 automatic movement The sapphire glass is scratch-resistant, ensuring that the Belmont's handsome looks will endure for many years to come, as an heirloom to be handed down to future generations – as so many Prestex watches were before. Choose from either a h igh grade steel 3-link bracelet with folding clasp and ratcheted instant extension piece or a durable rubber strap in Blue, Black or Orange. The straps and the steel bracelet are fitted with quick release spring bars for ease of changing. Every Belmont is individually quality checked and tested in our workshops before being offered for sale. BELMONT SPECIFICATION THE DIAL DETAILS Functions: Hours/minutes/seconds Dial: Orange, Green or Blue fume with the Blemont wave pattern Indices: Quarter arabic filled with BGW9 lume Hands: Brushed and polished steel with BGW9 lume strip Bracelet or Strap: Stainless steel 3-link brushed finish, with folding clasp and ratchet extension or Rubber in Blue, Black or Orange Sweep second: Contrasting colour THE CASE Case Diameter: 42mm Overall Case Thickness: 13mm Lug to Lug Length: 50.0 mm Case Material: 316L solid stainless steel Double domed sapphire crystal with anti-reflective underside coating Screw-in case back stamped Screw-down crown with logo Water resistance to 300m (990 feet) THE MOVEMENT Miyota 9039 Tolerance : -10/+30s per day 38 hour power reserve THE PRESENTATION Orange microfibre polishing cloth Presentation case in black Every Duckworth Prestex comes with a 2 year warranty.

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
42 mm
Lug-to-lug
50 mm
Thickness
13 mm
Thickness incl. crystal
Not listed
Lug width
13 mm
Material
316L steel

Movement

Type
Automatic
Caliber
Miyota 9039
Power reserve
Not listed
Functions
Not listed

Crystal and bezel

Crystal
Sapphire
Bezel
Not listed

Water resistance

Rated to
Not listed

Dial and lume

Dial
blue
Lume
Not listed

Strap

Strap
bracelet
Every spec Duckworth Prestex lists
Dial
Orange, Green or Blue fume with the Blemont wave pattern
Hands
Brushed and polished steel with BGW9 lume strip
Indices
Quarter arabic filled with BGW9 lume
Functions
Hours/minutes/seconds
Tolerance
-10/+30s per day
Sweep second
Contrasting colour
Case Diameter
42mm
Case Material
316L solid stainless steel
Bracelet or Strap
Stainless steel 3-link brushed finish, with folding clasp and ratchet extension or Rubber in Blue, Black or Orange
Lug to Lug Length
50.0 mm
Overall Case Thickness
13mm

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