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Home  /  Shop  /  Mods  /  Seiko Mod Blue Prospex – Automatic Diver Watch
A Seiko Diver's Automatic watch with a stainless steel link bracelet, featuring a vibrant blue dial, a black rotating bezel, and silver-tone indices.
The back view of a stainless steel watch with a matching metal link bracelet, showing the brushed case back, crown, and clasp on a light gray background.
A Seiko Diver's Automatic watch with a stainless steel link bracelet, featuring a blue dial, luminous green markers, and a black rotating bezel.
A Seiko stainless steel wristwatch with a blue dial and black bezel, shown worn on a person's wrist with a beige knit sleeve visible.
A Bexford stainless steel wristwatch with a vibrant blue dial and black bezel, presented inside its open black branded gift box on a dark textured background.
A Seiko Diver's Automatic watch with a stainless steel link bracelet, featuring a vibrant blue dial, a black rotating bezel, and silver-tone indices.
The back view of a stainless steel watch with a matching metal link bracelet, showing the brushed case back, crown, and clasp on a light gray background.
A Seiko Diver's Automatic watch with a stainless steel link bracelet, featuring a blue dial, luminous green markers, and a black rotating bezel.
A Seiko stainless steel wristwatch with a blue dial and black bezel, shown worn on a person's wrist with a beige knit sleeve visible.
A Bexford stainless steel wristwatch with a vibrant blue dial and black bezel, presented inside its open black branded gift box on a dark textured background.
Blue Seiko Prospex mod automatic dive watch with stainless steel bracelet
Bexford Watches  ·  Mods

Seiko Mod Blue Prospex – Automatic Diver Watch

Price

$388.00

In Stock  ·  Ships within 3–5 business days

Just 1 left. Order soon!

1-Year Warranty
Quick Ship
14-Day Returns
Hand Assembled

Built for those who appreciate the iconic look of a classic dive watch with a custom edge.

This custom-built automatic diver features a striking blue sunburst dial that shifts beautifully with the light, paired with a rotating dive bezel, luminous hands and markers, and a substantial 42mm stainless steel case.

At its heart is the proven NH35A automatic movement, featuring 24 jewels, hand-winding and hacking functionality, and over 41 hours of power reserve. A scratch-resistant sapphire crystal protects the dial, while the screw-down crown, screw-down case back, and 200M water-resistance rating complete the dive-inspired construction.

Finished with a solid stainless steel Oyster-style bracelet, this is a versatile everyday timepiece with the wrist presence and mechanical character watch enthusiasts appreciate.

Highlights

  • NH35A Automatic Movement
  • Blue Sunburst Dial 
  • Sapphire Crystal 
  • Luminous Hands & Markers 
  • Rotating Dive Bezel 
  • 200M Water Resistance 
  • 316L Stainless Steel 
  • 41+ Hour Power Reserve

Custom-Built Timepiece

This watch is an independently assembled custom MOD timepiece built around an NH35A automatic movement and selected components. It is not a factory-produced Seiko model and is not manufactured, authorized, endorsed, or warranted by Seiko Watch Corporation.

Bezel 316L Stainless Steel
Bracelet style Oyster
Case back Screwdown
Case diameter 42mm
Case material 316L stainless steel
Crown Screwdown crown
Glass Sapphire Crystal Glass (Blue Film)
Jewels 24
Lug to lug 48.2mm
Lug width 20mm
Movement NH35A
Power reserve 41H+
Preorder true
Preorder ship window 14 Days
Thickness 14.35mm
Vibrations per hour 21,600 bph
Water resistance 20Bar (200M)
Weight 174g

Every Bexford watch is hand-assembled at our bench. We source the same components we use in our own daily wearers. All finished watches ship with a 1-year assembly warranty — if something isn't right, we make it right.

Shipping: In-stock items ship within 3–5 business days. Made-to-order items ship within 14 days.

Returns: 14-day returns for unworn, unmodified items. Made-to-order builds are final sale unless defective.

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FAQ

Common Questions.

Still have questions? Reach out directly.

We primarily use Seiko NH35, NH36, and NH34 automatic movements — proven, serviceable, and reliable. Movement caliber is always listed in the product specs.
Our average build time is 14 days. Sold-out items typically have a ~1-month lead time — we'll confirm before you pay.
Yes. All finished Bexford watches include a 1-year warranty covering assembly defects and movement issues.
Yes. Diver models use screw-down crowns and casebacks and are pressure-tested before shipping. The Sentinel is rated to 100m / 330ft.
Absolutely. We sell the exact same movements, dials, and components we use in our own builds. Browse the Movements, Dials, and Stickers categories in the shop.
Sold-out items remain visible with an "Inquire to Order" option. Use the contact form — we'll give you a firm lead time and hold your spot.