Sumo size relative to PO?

jason_recliner said:

And yet out works pretty well on a 7 inch wrist due to the low profile, heavy tapering, and curved lugs. One of Seiko's finest, cleverest hours.

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Depends on the shape of the wrist. The flat area on top. Some of us have wide flat wrists, others more rounded. I have 7 1/4" diameter wrists, but more rounded. Flat area on top can handle typically 46mm with little to no lcurvature on the lugs, so Seiko 007's fit well. My GSAR it about the limit for a flat case, buy my Squale 1521 strongly curved lugs even though over 48mm fits perfectly.

I've seen people with less than 7" wrists able to wear a Sumo. But in many wrist shots I have seen of the Sumo, it is too big for the owner: the lugs on at least one side are suspended, not resting on the wrist. Looking head on, the watch will look ok on a large wrist, but looking down the wrist, you can often see one side in the air. That's how my Sumo was, and consequently it moved around more that I cared for. I had a MM300, which is 50mm a believe, which did not do that. BFK also was more comfortable.

So so diameter is one factor, but shape is as important, IMHO. I always look at case L x W, not just Watch diameter.

dfiled said:

Thanks a lot for this, really helpful. Ideally i'm looking for a more budget watch. I googled BFK but what I came up was the SKA371. Is that what you meant? . Forgive me if my ignorance, I'm new to Seiko. But the SKA371 only has a 42mm case according to Amazon. Is there a model number attached to the BFK that you were suggesting?

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Yes, that's one model of the "BFK". i.e. "big freaking Kinetic". Some links below. Some people do not like kinetics; other's do. I had one, and found it to be surprisingly comfortable to wear for such a heavy watch. The bracelet is very well made, perhaps one of the best made for an inexpensive diver. Some have lamented that the BFK's is better than the Sumo and other divers costing several times the BFK. I had a MM300 at the time, and found myself wearing the BFK more because it made a great beater watch, but looked almost as nice as the MM300. Only someone who know about the MM300 would notice it, and the BFK got as many compliments.

The Seiko Shogun is the titanium SBDC007. It has Seiko's proprietary Diashield treatment. I had one and used for a daily wear for about a year, and it had zero of those small almost invisible swirls you get with SS. It has the 6R15 movement, same as the Sumo. It's a bit smaller at 51mm, and is light as a feather. It was and is one of my favorite all time divers, but just a bit too big for my 7 1/4" wrist.

The BFK can be had with the SS bracelet new for around $225; the Shogun closer to $800, and not a beater. Used BFK's in excellent condition can be found for less than $200.

I have owned many Seiko's, in addition to those above several variants of the 007, SARB059 (only watch I still regret flipping), SARB021, Gray Ghost, Monster (shark tooth dial), and a Sumo. The one I cared for the least is the Sumo; it was too big, but also looked to clownish. But it is an excellent value, and those who like it are fanatical (insult the Sumo and be prepared to never start your own car again).

Right now I have a Squale 1521, but it was defective out of the box, and I'm still working on a replacement (disappointedly slow - 4 weeks now; the dealer has been very responsive and helpful, but one has to re-think the mfg... too bad because it's a great looking and fitting watch). Also a Marathon GSAR, and just received a Precista PRS-18Q.

The Legendary Seiko BFK SKA371 | Tough Watches
Seiko Kinetic Diver - SKA579P2 | Yeoman's Watch Review
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