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Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with recreations and reinterpretations of landmark achievements. This versatile timepiece reimagines Seiko's 1965 first diver's watch, an automatic timepiece with a then exceptional water resistance of 150 meters. Offering an extraordinarily legible dial and durable enough to become standard equipment on the Japanese Antarctic Research Expedition (JARE), this timepiece propelled Seiko into the forefront of dive watch design.

With contemporary styling and upgraded specifications, this new reinterpretation reflects the look of the 1965 original, but with a sleeker and thinner case designed to fit more comfortably on the wrist. The charcoal dial, framed by a black one-way rotating elapsed timing bezel, includes a date calendar and LumiBrite hands and markers. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and can be wound manually or automatically. Crafted of stainless steel with super-hard coating, this timepiece features a dual-curved anti-reflective sapphire crystal, screwdown crown and caseback, and tri-fold push button release clasp with secure lock and extender, and follows ISO standards for scuba diving.


  • Product Number: 450018188472
  • Model Number: SPB143
  • Collection: Prospex
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 40.5 mm
  • Case Material: Stainless Steel
  • Bracelet: Stainless Steel
  • Complication: Date
  • Warranty:

    3-year warranty

  • Case Thickness: 13.2 mm
  • Caseback: Plain, stainless steel
  • Bezel: Unidirectional rotating
  • Watch Crystal: Dual-curved sapphire with anti-reflective coating on inner surface
  • Clasp: Three-fold clasp with Secure Lock & push button release, solid & slide adjuster
  • Power Reserve: 70 hours
  • Functions: Hours, minutes, seconds, date, stop seconds hand function
  • Water Resistance: 200 metres / 20 ATM
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EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

Seiko

Seiko Prospex Sea 1965 Diver Automatic 40 mm Stainless Steel

Prospex Sea 1965 Diver Automatic 40 mm Stainless Steel
Estimated Price:
$ 1,595
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Please note the estimated time for our engraving services is 7 to 10 business days. Engraved items are final sale.

Once adjusted Tudor watches are final sale.

Note that in store (after sale) adjustments to your Tudor watch is available exclusively in Official Tudor Maison Birks locations.

Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with recreations and reinterpretations of landmark achievements. This versatile timepiece reimagines Seiko's 1965 first diver's watch, an automatic timepiece with a then exceptional water resistance of 150 meters. Offering an extraordinarily legible dial and durable enough to become standard equipment on the Japanese Antarctic Research Expedition (JARE), this timepiece propelled Seiko into the forefront of dive watch design.

With contemporary styling and upgraded specifications, this new reinterpretation reflects the look of the 1965 original, but with a sleeker and thinner case designed to fit more comfortably on the wrist. The charcoal dial, framed by a black one-way rotating elapsed timing bezel, includes a date calendar and LumiBrite hands and markers. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and can be wound manually or automatically. Crafted of stainless steel with super-hard coating, this timepiece features a dual-curved anti-reflective sapphire crystal, screwdown crown and caseback, and tri-fold push button release clasp with secure lock and extender, and follows ISO standards for scuba diving.


  • Product Number: 450018188472
  • Model Number: SPB143
  • Collection: Prospex
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 40.5 mm
  • Case Material: Stainless Steel
  • Bracelet: Stainless Steel
  • Complication: Date
  • Warranty:

    3-year warranty

  • Case Thickness: 13.2 mm
  • Caseback: Plain, stainless steel
  • Bezel: Unidirectional rotating
  • Watch Crystal: Dual-curved sapphire with anti-reflective coating on inner surface
  • Clasp: Three-fold clasp with Secure Lock & push button release, solid & slide adjuster
  • Power Reserve: 70 hours
  • Functions: Hours, minutes, seconds, date, stop seconds hand function
  • Water Resistance: 200 metres / 20 ATM
View More Details
View Fewer Details

EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with recreations and reinterpretations of landmark achievements. This versatile timepiece reimagines Seiko's 1965 first diver's watch, an automatic timepiece with a then exceptional water resistance of 150 meters. Offering an extraordinarily legible dial and durable enough to become standard equipment on the Japanese Antarctic Research Expedition (JARE), this timepiece propelled Seiko into the forefront of dive watch design.

With contemporary styling and upgraded specifications, this new reinterpretation reflects the look of the 1965 original, but with a sleeker and thinner case designed to fit more comfortably on the wrist. The charcoal dial, framed by a black one-way rotating elapsed timing bezel, includes a date calendar and LumiBrite hands and markers. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and can be wound manually or automatically. Crafted of stainless steel with super-hard coating, this timepiece features a dual-curved anti-reflective sapphire crystal, screwdown crown and caseback, and tri-fold push button release clasp with secure lock and extender, and follows ISO standards for scuba diving.


  • Product Number: 450018188472
  • Model Number: SPB143
  • Collection: Prospex
  • Movement: Automatic
  • Dial Colour/Material: Black
  • Case Size: 40.5 mm
  • Case Material: Stainless Steel
  • Bracelet: Stainless Steel
  • Complication: Date
  • Warranty:

    3-year warranty

  • Case Thickness: 13.2 mm
  • Caseback: Plain, stainless steel
  • Bezel: Unidirectional rotating
  • Watch Crystal: Dual-curved sapphire with anti-reflective coating on inner surface
  • Clasp: Three-fold clasp with Secure Lock & push button release, solid & slide adjuster
  • Power Reserve: 70 hours
  • Functions: Hours, minutes, seconds, date, stop seconds hand function
  • Water Resistance: 200 metres / 20 ATM
View More Details
View Fewer Details

EXTENDED HOLIDAY RETURN POLICY

For all regular-priced merchandise purchased online at MaisonBirks.com or in a Maison Birks or Birks Royalmount store from December 1st - 13th, 2025, returns and exchanges will be accepted until January 14th, 2026.

RETURNS

All watches purchased on MaisonBirks.com can only be returned or exchanged by mail within 30 days of delivery, provided merchandise has not been worn, altered, engraved, or special-ordered. All claims, returns, battery replacement, or warranty service must be accompanied by proof of purchase, original packaging and warranty materials. All returns are subject to a quality inspection to ensure the merchandise meets our return policy criteria. All merchandise purchased with cryptocurrency is final sale. For more information, click here.

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