Grand Seiko Heritage Collection Stainless Steel Blue 40mm Dial Bracelet SBGA375 - PRE OWNED

Grand Seiko Heritage Collection Stainless Steel Blue 40mm Dial Bracelet SBGA375 - PRE OWNED

Item No. SBGA375 | Limited Supply 5 others view this page

Retail Price: $5,200

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Box & Papers
Grand Seiko
Production Year
Current Production
Model Number
Grand Seiko Heritage Collection
Model Year
Current Model


Screw Down
Stainless Steel
Stainless Steel
Case Size
40 mm


Dial Type
Date at
3 o’clock
Dial Color
Dial Markers


Band Material
Stainless Steel
Fold-Over Clasp
Steel Bracelet


Watch Style
Sports Watch
Country of Manufacture
Power Reserve
Water Resistance
100 Meters (330 Feet)


Hey, welcome back to Jaztime. is an online store that buys, sells, and trades authentic luxury watches. We make these videos so you can easily choose the best watch for yourself in the comfort of your own home. We offer the lowest prices anywhere online. If you'd like to know the price, simply click on the links in the description below. We'd greatly appreciated it if you purchased your next watch from us at Today, we'll be talking about the Grand Seiko, this one part of the Grand Seiko Heritage collection, reference number SPGA375. That's the easiest way to find this one. This one, basically a 40 millimeter case with the darkest blue dial I have ever seen anywhere. The darkest blue I have seen on anything anywhere, honestly. You can barely see it. I can barely see it on my monitoring here, and it's a little bit easier to see with the eyes, but that's all basically intentional. They make this as close to black as possible. All right, so I'll be going over the case, the dial, the bezel, what there is of it, the crown functions, as well as the movement and the bracelet. I'll be giving my thoughts on all of these throughout this video. Now, starting off with the case, we have a 40 millimeter case from finger to thumb. That's the two to eight o'clock distance, also at the 10 to four distance, same with 40 millimeters. All right. It's a 12.5 millimeter thickness, and it also has a full stainless steel construction made with a polishing technique called zaratsu, where the polishing is done on the side of the wheel, actually, and done entirely by hand. So all of this hand-finished, almost kind of like up to the Patek Philipe standards. But you certainly get this with Japanese workmanship, fully straightened and very nicely curved portions of this watch all done by hand to extreme precision. And certainly, you get that same workmanship on at this bezel as well. Nice and high polish along all of its sides. The case also a nice, high polish on every side, as you can see. Complete with my fingerprints, of course. With a very, very subtle brush finishing on the inner portions of these lugs, as you can see. Again, all stainless steel construction, so made with that very high polish, looks very beautiful on, you know, all of these surfaces here. You have the Grand Seiko winding crown, also with a sandblasted finish on the inside there with the high polish for the GS as well. All right, so all of this, including the scratch-resistant sapphire crystal, dual curved as well, gives you a total water resistance of a hundred meters or 330 feet below sea level or 10 bar, essentially. Now taking a look at this dial, again, a midnight blue, so dark that it's almost black. And there's also a sunray type of finishing. As I move it throughout this light box, you can kind of see it, almost like a sunburst effect, as you would find on many Rolex watches and certainly Grand Seiko not an exception to this. Just about every watchmaker has a watch like this, even Patek Philipe and Audemars Piguet, and even, you know, Vacheron Constantin in some watches have some sort of effect like this. And this one, it certainly has that depth to that blue that's just absolutely, it just sort of pulls you in. And certainly with that, the darkness of that blue, it makes those index out marks very, very easy to read in any lighting situation. even when it's relatively dark. Granted, there's no luminescence. I can just show it to you now. No luminescence whatsoever, right? My camera cannot focus, but anyway, no luminescence whatsoever, but you can still see it because it's so dark in that background there. On this dial, you also have the Dauphine style hands, Lance style seconds hand, nicely sweeping. And if you notice, it's not actually ticking, it's just sweeping smoothly. You can't even see the micro ticks of it. And that's due to the spring drive printed on the dial. You also have the power reserve for that spring drive. It's pretty low right now, but I'll show you how to wind it up in just a moment without just wearing it on your wrist, of course. All right now, if you unwind the crown at the three o'clock position, this allows you to wind the watch manually. And turning it allows you to then charge the spring drive, as you can see in that power meter at the eight o'clock position. It's going up or rather it's going downward to signify the fullness of that meter, all right. So you just keep winding until you reach the maximum power reserve. Nice and easy. Once you reach the end, no need to wind it any anymore because excessive winding could potentially damage the main spring barrel, right? Let me move this out of the way for a bit. Pull the crown out to the next position. You can then adjust the date. It's about, I believe...Okay, yes, it's a counterclockwise turn, about a quarter turn to advance the date forward. So if you find yourself on a 30 day month, you can just move it once to, you know, say the 31st or when you're on the first of the next month, just move it once. And there you go. You're on the first of the next month, nicely and easily, right? Pull the crown out to the final position. Note that it does stop that seconds hand. So you do have that hacking seconds function. You can then place the minute hand precisely wherever it needs to go. Based on the position of that seconds hand, wait for it to synchronize to an atomic clock, press the crown back in to start up that seconds hand and wind it tightly against the case to ensure that superior water resistance. Nice and easy. All right, so what makes all of this work? What makes this thing work so incredibly well? It's the spring drive on the inside ref or the caliber number 9R65. You can see it through the case back. It has the exhibition case back. A sapphire crystal on the back as well to protect it and keep it nice and scratch-resistant. So the 9R65 is a spring drive. Again, it has 72 hours of power reserve. Very, very good. You have three whole days where you can just essentially have this out, not wearing it, and it will be keeping track of time just fine. And you even have that power indicator to show you how much power you have left. So basically it combines the best of both worlds, both the mechanical and quartz manufactured movements, such that the mechanical portion has a main spring barrel that charges essentially the inside of the watch. It moves a little magnet and a coil back and forth to charge a quartz crystal, which then powers the movement of that seconds hand. And so you have a seconds hand that's moving so incredibly fast so that the ticking is literally imperceptible to the human eye. I literally can't even see it with my own eyes. It's a perfect sweep as far as I'm concerned and actually it has an average accuracy of plus or minus 15 seconds per month. That's less than a second differential per day, much more accurate than any Rolex, Patek Philipe, Audemars Piguet, any sort of watch that you will ever find save for, you know, another quartz movement. But the added benefit of the spring drive is that it does not require a battery to power it because it, again, takes the best of both worlds, the mechanical using the main spring barrel to power the movement, the literal pressure of the movement on the inside, and then using the quartz to regulate that movement and give you accuracy second to none. Literally second to none. Seiko is the company that created the quartz movement and they're the company to create the spring drive movement. All right. So anyway, back to the framing of this watch. We have, again, a full stainless steel construction here on their almost oyster-style link bracelet here, integrated into the case, as you can see. It also has what seems to be three pieces, but it's actually five pieces. The outer, most intermediary links are high polish with the center most link being a sand-brushed finish matching that of the outer two links, right? And you also have a nice high polish on the sides as well. These links are removable with screws. So if you ever need to size it, you have that option, very nice and easy. You also have the fold-over clasp, which is opened by using a twin trigger system, twin button system. Just press both of them in to open it up. You also have a nice button type of system, so it will not wear anywhere near as much as say, you know, a hook and beak system over time because this does stay very secure, very solid. You have the Grand Seiko logo on there, micro blasted behind it with a nice high polish for the logo itself, sand-brush finishing on the clasp, matching that of the rest of this bracelet. And certainly while I'm here, I can give you my thoughts as to how it wears on the wrist. Right, now keep in mind, my wrist is seven inches in circumference or 18 centimeters. And therefore, you know, this case is a little bit big for me at 40 millimeters. It's kind of big on my wrist, but it certainly fits very nicely looking at it down the wrist. The curvature of the lugs, the curvature of the case in general actually does very much fit my wrist very nicely. You can wear this if your wrist is, you know, basically around six inches, as low as six inches, even though it will look perceptively larger as well. And certainly when it comes to looking at it face on, you do have a tiny bit of framing from the 12 and six o'clock size with that bracelet. If you have a larger wrist, certainly you'll get better framing as well. Just looks better overall. When it comes to the readability, it's incredibly easy. It's almost black, so the 18 carat white gold index markers and the hands just makes it incredibly easy to read. So clear, so easy, and it's just everything that you ever need from a watch. And it just looks good with that almost, that literal midnight blue, almost black. So leave a comment down below. Tell us what you think about this watch. Be sure to like this video, be sure to subscribe as well. Hit that bell notification so you can be notified when we go live with another video like this one. And as always, if you'd like to purchase this watch or any other watch, visit us in our online store at where you can get it for the lowest price anywhere online. We'll see you in the next video. Take care.