Seiko Prospex 1965 Revival Diver's 3-day 300m in Scuba Blue

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Seiko Prospex 1965 Revival Diver's 3-day 300m in Scuba Blue

Name: Seiko Prospex 1965 Revival Diver's 3-day 300m in Scuba Blue
Brand: Seiko
SKU: SPB451J1
Availability: InStock

Ref. SPB451J1

Among our 187 Seiko watchesThis watch£1,250

Premium

Sits in Seiko’s upper tier here — more premium than three quarters of the Seiko watches we list, which start at £110.

The 62MAS of 1965 was Japan's first dive watch — worn on the wrists of Japanese Antarctic Research Expedition members between 1966 and 1969 — and the SPB451J1 draws its proportions, its crown position and its barrel-case silhouette directly from that original. What the revival adds is substantial: the water resistance rating has climbed from 200 metres on earlier revivals to 300 metres now, and the case has come down to 13mm, a thinness that feels incongruous for a watch rated this deep and means it actually disappears beneath a shirt cuff in a way that professional divers rarely manage. The sunray-finished blue dial shifts between navy and something closer to cobalt depending on the angle, and the bezel insert matches it closely enough that the watch reads as a single colour from a distance. At 40mm with a 46.4mm lug-to-lug, the proportions sit on the larger side of neutral for most wrists; the lugs have some elevation off the wrist, so the case presents with a slight presence rather than hugging flat. The 6R55 is the detail worth understanding. Seiko rates it to a 72-hour power reserve, specifies the mainspring in their own Spron 510 alloy — developed in-house to resist corrosion and fatigue — and builds in Etachron regulation, which allows fine-tuning without disassembly. It is a movement built to last and to be serviced simply, which is exactly what belongs inside a watch meant for serious use.

Reference: SPB451J1
Brand: Seiko
Collection: Prospex
Case size: 40mm
Case thickness: 13mm
Lug width: 20mm
Case material: Stainless steel
Dial: Blue
Crystal: Sapphire
Bezel: Unidirectional rotating
Movement: Automatic
Calibre: 6R35
Functions: Date
Water resistance: 300m
Bracelet / strap: Stainless steel bracelet
Strap colour: Silver
Clasp: Three-fold clasp
Lume: LumiBrite
Retailer: Goldsmiths

Additional specifications

Lug-to-lug: 46.4mm
Weight: 168g

Learn more about Seiko

Kintaro Hattori opened a watch and clock shop in Tokyo in 1881, aged twenty-one, and began manufacturing under the name Seikosha — roughly, house of exquisite workmanship — in 1892. The Seiko name appeared on watches from 1924.

The company's significance is that it broke the Swiss monopoly twice. First on precision: Seiko was appointed official timekeeper of the 1964 Tokyo Olympics and built the quartz chronometers and printing timers to do it, and in the 1960s its movements placed highly at the Neuchâtel and Geneva observatory trials against the best Swiss houses.

Then on technology. On Christmas Day 1969 Seiko released the Astron, the world's first quartz wristwatch, accurate to five seconds a month where mechanical watches managed that per day. The consequences for Switzerland were catastrophic — employment in the Swiss industry fell by roughly two-thirds over the following decade. Seiko deliberately did not enforce its quartz patents, allowing the technology to spread.

The same year it produced the 6139, among the first automatic chronographs, and it has since introduced Kinetic, Spring Drive — a hybrid regulating a mechanical mainspring electronically, giving a perfectly gliding seconds hand — and its own dive and field lines.

Seiko remains fully vertically integrated, making its own hairsprings, quartz crystals, and even the Zaratsu-polished cases, at price points from under a hundred pounds upward.

1881: Kintaro Hattori opens his Tokyo shop.
1924: The first watches carry the Seiko name.
1964: Official timekeeper of the Tokyo Olympics.
1969: The Astron becomes the first quartz wristwatch.
1999: Spring Drive enters production.

All Seiko watches

Also in 7 collections

This watch appears in the Seiko Prospex range (33), Back in Stock (4,868), Stainless Steel Watches (3,133), Automatic Watches (1,750), Blue Dial Watches (861), Sports Watches (800) and Dive Watches (572).

Best of 2 retailers

What the specifications mean

A mechanical watch built to be worn hard and got wet.

Strengths

300m water resistance, rated for actual diving
40mm suits most wrists
46.4mm lug-to-lug keeps the 40mm case wearable
Sapphire crystal, which resists scratching
Luminous hands and markers for low light

Best forDivingSwimmingEveryday wear

Also seen with this model (7)

Other versions of this model, not necessarily this exact watch.

Martin Sheen · Seiko Diver ref. 6105 · Worn on screen · Apocalypse Now · Source
Arnold Schwarzenegger · Seiko Prospex ref. H558-5009 · Worn on screen · Predator, Commando, The Running Man · Source
Robert Redford · Seiko Diver ref. SKX009 · Worn on screen · All Is Lost · Source
Roger Moore · Seiko Diver ref. 7549-7009 · Worn on screen · For Your Eyes Only, Ffolkes · Source
Sam Claflin · Seiko Diver ref. SKX009 · Worn on screen · Adrift · Source
Ed Harris · Seiko Diver ref. 6309 · Worn on screen · The Abyss · Source
Kiefer Sutherland · Seiko Diver ref. 6105 · Worn on screen · A Soldier's Sweetheart · Source

Seiko Prospex 1965 Revival Diver's alternatives

Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.

Prospex 1965 Revival Diver's 3-day 300m in Scuba Blue compared with 2 alternatives from other brands
Specification	This watchProspex 1965 Revival Diver's 3-day 300m in Scuba BlueSPB451J1	LonginesHydroConquest 41mm Mens WatchL37424566	HamiltonKhaki Navy Frogman Auto 41mm Mens Watch BlackH77455330
Price	£1,250	£1,300	£1,145
Case size	40mm	41mm	41mm
Water resistance	300m	300m	300m
Movement	Automatic	Automatic	Automatic
Strap	Stainless steel bracelet	Stainless steel bracelet	Rubber strap
Power reserve	—	64 hours	80 hours
	This watch	Closely matched	Closely matched