I picked up the Seiko 5 Sports SRPJ85K1 second-hand, at more than 50% off the retail price about 6 months ago. It's in about 95% condition, with no scratches on the case and just one tiny scratch on the crystal.
For that price, I'm pretty happy, and after wearing it for a while, I wanted to write down my thoughts about this lovely wristwatch!
The look
It's a field watch, and it nails the style. The dial is black with a sandy texture, and it honestly reminds me of the beaches back in my hometown. The cool part is that the dial changes with the light, going from sand gray in bright light to almost pure black in the shade.
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The numerals are raised and have a creamy, vintage color. They're very legible, and they look good doing it. I love the contrast between the hour numerals and the dial!
The seconds hand has a red arrow tip that also pops against the dark dial.
The hour and minute hands have blue lume, which I like more than the usual green. It's not as bright, but it reminds me of Bilbo's Sting sword from Lord of the Rings, which glows blue when an orc is nearby. It's a nifty detail. The tip of the seconds hand also has a bit of lume.
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There's also an extra hourly marker, a Latin "automatic" text, and silvery 24-hour markers. These small details make the dial feel like it was designed with care, not just stamped out.
The crystal is slightly domed, and the dome warps the dial a bit if you view it from an angle. I think that looks classy and cool.
The Seiko text is applied, and it carries the new Seiko 5 logo. The case has a matte sandblasted finish that I really like. And honestly, this watch looks better in person than in photos.
Size and fit
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Officially, the case is 36.4mm in diameter, 12.5mm thick, and 44.4mm lug-to-lug. On my 16.5 cm wrist, that's a great fit. It feels elegant and vintage without being tiny. The crown is big and wide but doesn't stick out, so it's easy to grab and never digs into my wrist.
I already have an Alba, my first mechanical watch, which is also a field-style watch, and I talked about it alongside the memory of my late dad. However, I think I prefer this smaller Seiko. The Alba has a 42 mm case, which suited me when I bought it, but I have since lost a lot of weight. This 36 mm case on the Seiko suits my wrist better.
Everyday stuff
The caliber is the 4R36, which is automatic with manual winding, has a stop-second (hacking) function, and a power reserve of about 41 hours.
Mine runs at roughly -15 seconds a day. It's not perfect, but it's fine for me, and I like that I can hand-wind it and hack the seconds to set it precisely.
The clear caseback lets me watch the movement work, and I like the Japanese day display too. It does come with the English day mode too, but the Japanese one looks cooler! And since the daydate display, located in the 3 o'clock position, is in negative color (white text, black background), it integrates seamlessly with the dial.
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Water resistance is rated at 10 bar, which is plenty for daily life. I could wear it near water without worry, but I don't think I'll ever try to totally submerge it.
The drilled lugs make swapping straps easy, which makes this watch a total strap monster. I have like 4 straps (nylon, NATO, and a couple of leathers) that I rotate for this watch.
Between the straps and the size, I can wear it to almost any occasion.
For the record, here's what Seiko lists. The case is stainless steel with a curved Hardlex crystal. The movement is caliber 4R36 with 24 jewels. The lug width is 18mm, magnetic resistance is 4,800 A/m, and the watch weighs 64.0g with a see-through, screw-down caseback.
That's what Seiko said.
What I don't love
My biggest gripe is the lume. Only the hands glow brightly. The hour markers are very dim, and the numerals have none. In the dark, I can see the hands but no triangle marker fully glows since the lume is only in a dot. The blue lume on the hands is nice, but it only goes so far.
The original strap is another miss. The stock olive-green NATO makes the watch bulky and sit too tall on the wrist.
I swapped to a single-pass NATO, and I also rotate through leather and nylon, which looks much better. The catch is that finding a steel bracelet is tough. The matte finish makes matching one hard, and an 18mm matte steel bracelet is almost impossible to find, so bracelet lovers will struggle.
The matte sandblasted case is cool, but it isn't very dressy. With formal attire, it doesn't look as sharp as a polished watch would, though it works well for everything else.
The case also has lots of corners. There are nice details, but the gaps between the bezel and crystal and the nooks in the caseback are a pain to clean.
The crystal is reflective and catches glare at certain angles and lighting, but most of the time it's fine and not a big deal. I've seen some internet people gripe about it, but in person, it really is not that bad.
And lastly, Seiko's price increases haven't been kind, which is another reason I'm glad I bought this one second-hand.
The SRPJ85K1 has a great dial, a great size, and plenty of small details that I keep noticing. The downsides are mostly lume, strap, and cleaning nitpicks. If you have a wrist around mine and want a vintage-feeling field watch, I'd happily recommend it, preferably at a used price.