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Seiko Prospex Sea Day-Date 45mm Ref:SRPE05

Seiko Prospex Sea Day-Date 45mm

Reference: SRPE05

★★★★★
★★★★★
5
1 ratings 1 reviews
The Seiko Prospex Sea Day-Date 45mm in silver, black and green is a dive watch released under the Prospex collection. In terms of construction this version features a 45mm and stainless steel case paired with a silicone band and sapphire crystal. The movement is an automatic Seiko reference 4R36. It has a power reserve of 41 hours and beats at a frequency of 21 600 beats per hour.

Essentials

Collection
Nickname
Turtle
Watch style
Crystal
Sapphire
Materials case
Stainless steel
Materials band
Silicone
Water resistance
200 m

Visuals

Case shape
Cushion
Case diameter
45 mm
Case height
13.2 mm
Lug width
22 mm
Lug to lug
47.7 mm
Weight
124 g
Indices
Arrows, Round
Colors case
Silver, Black
Colors dial
Green
Colors band
Green

Movement

Caliber
Seiko 4R36
Type
Automatic
Power reserve
41 hours
Frequency
21 600 bph / 3 Hz
No. of jewels
24
Complications
design
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0
0
1
0
movement
0
0
0
1
0
band
0
0
1
0
0
legibility
0
0
0
0
1
value
0
1
0
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chronoshots

Variations

Brand - Seiko

From its inception, Seiko has been a trailblazer in horological innovation, consistently pushing the boundaries of what's possible in timekeeping. One of its groundbreaking achievements came in 1969 with the launch of the Seiko Astron, the world's first quartz watch, which revolutionized the market with its accuracy and reliability. Seiko has continued to innovate with the introduction of numerous groundbreaking technologies, including the Spring Drive movement, which combines the precision of a quartz watch with the craftsmanship of a mechanical timepiece. Moreover, Seiko has maintained its commitment to craftsmanship and quality, producing a diverse range of watches that cater to a wide spectrum of tastes and preferences, from classic dress watches to rugged dive watches. With a legacy of innovation and excellence spanning over a century, Seiko remains a driving force in the watchmaking world, revered for its technical prowess, reliability, and enduring style.

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Reviews

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media-libraryhfgXqQ Urszuly Patrik wrist 7.00"/17.78cm
★★★★★
★★★★★
May 8, 2025

The Seiko Turtle. My God. I believe it is my favourite Seiko. So, reader, be cautious, my review of the Seiko Turtle will be completely corrupted and biased.

To offset that a little bit, I must also state that I do not own this watch any longer, I have parted with it. Why, you ask? Well, as they say it, I was young and needed the money. But seriously, there were some issues. I’ll be happy to talk about the issues. Let’s do exactly that.

My version of the Turtle was the SRPC91K1 Save The Ocean model, which sported a beautifully textured, vibrant blue dial and black PVD-coated bezel and crown. It was my first serious watch, I paid for it with my first paycheck, so it was very sentimental.

As you may have guessed already, the main problem was the size of the watch. It is HUUUGE, as a certain US president would say. It is huge indeed at 45mm diameter and a tad over 47mm lug to lug, and the above 13mm thickness didn’t help at all.

It must be said, though, that it is highly likely that Seiko’s design and ergonomics team are deeply invested into black magic, and I’m also pretty sure that there is a group of witches aiding them with their creations, and I’m convinced of all of that because I never had a Seiko dive watch on my wrist that wasn’t incredibly comfortable.
There is something about the way the lugs are turning, the caseback, and probably the features of the cushion case itself, which makes wearing this big old daddy diver a heavenly experience.

Me personally, when I think of the Turtle, I immediately think of the Willard, which means I’m also thinking about the Vietnam War, not the horror and sadness about it, which is the reality of war, but the coolness of it captured in the movie Apocalypse Now, and specifically the scene where the US attack helicopters devastate anything that moves, while they are blasting Ride of the Valkyries from Wagner, which, in my honest opinion, is the coolest, most epic and cathartic couple of minutes in the history of cinema. I associate the Turtle with the jolt of adrenaline I always get from watching that scene (sometimes over and over again), and really, no marketing strategy could or would beat that ever.

Now for the other issues. Price. Especially current pricing, especially for the King Turtle, for which you have to pay around 600–700 euros, for the privilege of a piece of sapphire and a little bit of ceramic.
The regular Turtle is not that much better either—450 euros for a Hardlex-covered black watch housing a 4R movement on a rubber strap, packaged into thin pieces of paper, is, frankly, outrageous. This issue, of course, is now affecting pretty much everything Seiko is selling at the moment, so my advice is: buy pre-owned.

That is exactly what I did when I bought my Mini Turtle, which lacks the cool historical and pop cultural factors of the OG Turtle, but it is modestly sized and still great value for money.

To conclude, the Seiko Turtle is an amazing watch, with properly exciting heritage behind it, for outrageous sums of money. Buyer, be aware: your wrist must be HUUGE, but if it is, I do not see any reason why you shouldn’t own this insanely cool piece of watchmaking. Besides the price. But you can always get around that. I suggest you do.