Circula AquaSport II:
sized right, priced a notch high.

Most divers are built for a wrist that does not exist, and the AquaSport II is a rare one built for the wrist that does. It is 40mm across, 46mm lug to lug and 13.4mm thick with the crystal, and those three numbers are the whole reason to read a Circula review. Everything else on the sheet is competent. Only the fit is distinctive, and the price asks you to pay for that distinction.

The case for it is a measurement

The headline figure is not the 40mm. Diameter is the number everybody quotes and the number that tells you least. The one that decides whether a diver sits on the wrist or perches on it is lug to lug, and Circula publishes 46mm. That is short. A watch with a long lug span overhangs a small wrist and lifts at the strap, no matter how modest the diameter looks in the product photo. At 46mm the AquaSport II stays inside the footprint of an average wrist and most smaller ones.

Thickness is the other half. Circula gives 12.6mm without the crystal and 13.4mm with it. Be honest about which one you will wear: the second. At 13.4mm this is not a slim watch, and I would not pretend the case figure of 40mm makes it one. It is a normal-height diver in a compact footprint. That is a sensible compromise, and a better one than a thin watch that gives up its water resistance to get there.

The weight figures back this up. Circula lists 100g on the rubber strap and 155g on the steel bracelet. That 55g gap matters more than most spec-sheet differences, because it decides which version you actually buy. The rubber version is the light, forgettable one. The bracelet is the one with presence. I would choose by how you want the watch to behave on a long day, not by how it looks on a dealer’s pillow.

The water resistance is 20 ATM, which the maker’s page translates as 200 meters. The bezel is a 120-click unidirectional design with sapphire construction, and the crystal is a slightly curved sapphire with a double anti-reflective coating. Sapphire on both the bezel and the crystal is the right call at this price. It is what stops the daily scuffing that turns a nice diver into a tired one in a year.

The spec sheet, read properly

The movement is the Sellita SW200-1 in its Elabore grade, automatic and Swiss-made. It carries 26 jewels and beats at 28,800 vibrations per hour. Circula states an accuracy of minus 5 to plus 7 seconds per day. Read that range carefully. It is a stated tolerance, not a promise about the particular watch that arrives, and it is a tight enough window that I would not lose sleep over it. A movement that runs inside a twelve-second daily window is a movement you can wear with a clear conscience.

The SW200-1 is a common Swiss caliber, and that is an underrated feature. A watch a competent bench can repair in five years is worth more than one with an exotic caliber and a waiting list for parts. I did not source servicing costs, so weigh that point as a judgment and not a measured figure.

Now the weakness. Circula states the power reserve as a minimum of 38 hours, typically 41. That is the number that holds the movement score where it is. Take the watch off on Friday evening and it will have stopped by Sunday night, perhaps sooner. The page notes that the movement can also be hand-wound, so a few turns of the crown restarts it, but a watch that needs rescuing after a weekend is a watch whose reserve is trailing its price. A 70-hour reserve is the figure the Seiko Prospex SPB143 carries, and that gap is not cosmetic. It is the difference between a watch you can rotate and one you have to rotate around.

Is the reserve a dealbreaker? No. If this is your only watch, worn daily, you will never meet it. If it is one of four in a rotation, you will meet it every Monday. Know which owner you are before you pay.

The bracelet and the clasp

Both options are quick-change and both are 20mm at the lug. The choice is a tropical rubber strap or a solid Beads of Rice steel bracelet. Beads of Rice is a vintage-flavoured link pattern, and it suits the compact case better than a chunky modern link would. It is also the more expensive-feeling choice.

The clasp is the detail I would spend the extra money on, and here I do not have to. The steel bracelet carries a safety clasp with fine adjustment in 3 positions. That is a real feature. Three positions will not give you the infinite micro-tuning of a ratcheting diver’s extension, but it covers the daily swelling of a wrist across a warm afternoon, which is the problem a clasp adjustment actually exists to solve. Many watches at this price offer a fixed clasp and a spare link. This is better than that.

The 20mm lug width is the unglamorous plus. A 20mm strap is the most available size in the hobby, which means rubber, leather, NATO and bracelet options by the hundred. Quick-change makes swapping them easy. If you enjoy changing a watch’s character on a Saturday morning, this one makes the exercise easy.

The price, checked today

I checked the maker’s page on 13 October 2026. Circula lists the AquaSport II at US$850, marked down from US$940. That sits inside the band the Atlas entry records, so nothing has shifted under us. Notice what the markdown does, though. The honest price for the watch is the lower figure, and the page shows $850 as the current price. I would treat $850 as the price. One caveat on scope: the page I read is the green variant, reference AE-ST-PG, and I did not check other colourways.

What does $850 buy, set against the sheet? A compact case, sapphire throughout, 200 meters, a serviceable Swiss movement and a good clasp. What does it not buy? A long reserve or a famous name. That last one is the one buyers underweight. At this price you are paying for fit, finish and a small brand’s attention, and not for the resale value or the badge recognition of the established houses.

What it is not

It is not the value pick. The Citizen Promaster NY0086 is the Atlas entry’s value alternative, and it costs well under half of what Circula asks. It is a bigger watch with a different movement, and I would not call the two interchangeable, but if what you want is a competent 200 meter diver for the least money, the Citizen wins that argument without breaking a sweat. Do not buy the AquaSport II because you think it is the cheap option. It is not.

It is not the movement pick either. The Seiko Prospex SPB143 steps up to a 70-hour reserve and carries the sort of heritage that gives a diver an easy answer at a dinner table. It costs roughly $160 to $350 more, going by the Atlas price bands. If the weekend stoppage bothers you, that is the watch to save for.

And it is not a dress-adjacent diver. Thirteen point four millimetres of height with a rotating bezel means this goes under a cuff only on a generous day. The compact footprint helps. The thickness cancels some of that help.

So, worth the hype?

Conditionally, and the condition is specific. If you have a small to average wrist and you have been bounced off every diver because the lugs overhang, the AquaSport II is worth the premium, because fit is the one thing you cannot fix after purchase. A good strap fixes a plain dial. A smaller watch does not appear by magic.

If fit is not your problem, the money goes further elsewhere. For a lot less you get a Citizen. For roughly $160 to $350 more you get a Seiko with nearly twice the reserve. That squeeze is why the value sub-score sits at 19 and the movement at 18, while build at 20 and wearability at 21 carry the verdict. The result is “Worth a look”, which is a precise phrase rather than a polite one. Look hard, try it on if you can, and buy it only if the fit does what the sheet says.

My own position is plain: I would pay $850 for the lug span and not a dollar more. At $940 I would walk. That is the entire review in two sentences, and everything above this paragraph is the evidence.

Questions people ask

Is the Circula AquaSport II good for small wrists?

Yes, and it is the best reason to buy it. Circula lists 40mm across and 46mm lug to lug, which is short enough that the lugs stay on a smaller wrist. The 13.4mm thickness with the crystal is the one dimension that is not small.

How long does the AquaSport II run when it is not worn?

Circula states a minimum of 38 hours and typically 41. That means roughly a day and a half, so a watch left from Friday evening will usually have stopped by Sunday night. The movement can be hand-wound to restart it.

What movement does the Circula AquaSport II use?

It uses the Sellita SW200-1 in Elabore grade, an automatic Swiss-made movement with 26 jewels beating at 28,800 vibrations per hour. Circula states an accuracy of minus 5 to plus 7 seconds per day. It is a common caliber.

How much is the AquaSport II right now?

On 13 October 2026 Circula listed the green variant at US$850, marked down from US$940. Other colourways were not checked, so confirm the price on the variant you want.

Is the AquaSport II a real dive watch?

It carries a 20 ATM rating, which Circula’s page gives as 200 meters, along with a unidirectional 120-click sapphire bezel. On paper that meets the usual expectations of a diver. Whether you want a 38-hour reserve on one is a separate question.