If you own a five-digit Rolex Submariner or Sea-Dweller, turn your wrist over.
Is the clasp actually in the middle of your wrist?
There's a good chance it isn't.
And strangely, one of the things that makes these bracelets so adjustable can also make it very easy to adjust them badly.
The unusually long Rolex dive clasp
Compare a five-digit Submariner or Sea-Dweller with a contemporary GMT-Master and the difference underneath the wrist is immediately obvious.
The dive-watch clasp is much longer.
There's a good reason for this. These clasps accommodate Rolex's folding diver's extension, and they also provide a substantial range of traditional micro-adjustment positions.
That's useful.
But it also makes the Submariner and Sea-Dweller particularly easy watches to end up wearing with an off-centre clasp.
The problem with micro-adjustment
Here's the important bit.
When you move between the micro-adjustment holes inside these clasps, you're changing the effective bracelet length at the 12 o'clock side.
You're making the bracelet tighter or looser, but you're not redistributing that adjustment equally around your wrist.
Move far enough through those adjustment holes and you can therefore get the circumference absolutely perfect while simultaneously moving the clasp further away from the centre of your wrist.
The longer five-digit dive clasp gives you plenty of adjustment range, so it's particularly tempting to keep moving the spring bar until the watch feels right.
But fit and balance aren't the same thing.
Before adjusting the clasp, count your links
If your clasp is sitting off-centre, start by looking at the distribution of links between the two sides of the watch.
You may find that you can achieve exactly the same overall bracelet circumference with a better combination of links and micro-adjustment.
For example, if you're towards the end of the clasp's adjustment range, it may make more sense to move the micro-adjustment inward and redistribute a full link to the opposite side of the bracelet.
The overall circumference can remain similar.
But the clasp position can change dramatically.
And then there's the half-link problem
Sometimes the maths simply doesn't work with full links.
Imagine the bracelet length you need is equivalent to nine links.
You could have:
4 links + 5 links = 9
The circumference is right.
But the bracelet is inherently asymmetric.
With two half links, you can instead have:
4.5 links + 4.5 links = 9
Same overall length. Much better balance.
That's one of the reasons Steel Reef makes half links for five-digit Rolex bracelets. They aren't simply useful for finding a size between two full-link configurations — they can also be used to change where the clasp actually sits underneath your wrist.
Try this on your Submariner
Put the watch head exactly where you want it on top of your wrist.
Hold it there with one finger.
Now rotate your wrist and look underneath.
If your clasp is significantly off-centre, don't immediately reach for another micro-adjustment hole.
Look at the whole bracelet as a system.
Count the links on each side. Look at where your spring bar sits within the clasp. Consider whether a link could be redistributed — or whether half links would allow you to divide the bracelet more evenly.
Those multiple holes inside a five-digit Submariner or Sea-Dweller clasp give you an enormous amount of adjustment.
The trick is not using them to compensate for a bracelet that was unbalanced in the first place.
