The Addiesdive AD2520 is a 40mm VK64 mecaquartz chronograph — ceramic tachymeter bezel, bubble K1 mineral crystal, BGW9 luminous markers and hands, screw-down crown and pushers, 316L stainless steel case and bracelet, 13mm thickness, 48mm lug-to-lug, 128g, 100m water resistance. Paint-splash inspired sub-dial design in four colour variants.
| Specification | Detail |
|---|---|
| Model | AD2520 |
| Movement | Seiko VK64 mecaquartz |
| Chronograph | 1/5-second sweep chrono seconds, 60-min counter at 9H |
| 24H display | Yes — sub-dial at 3H |
| Date | Yes — at 6H |
| Accuracy | ±20 seconds/month |
| Battery | SR936SW, ~3 years |
| Case diameter | 40mm (excluding crown) |
| Case thickness | 13mm |
| Lug to lug | 48mm |
| Lug width | 20mm |
| Case material | 316L stainless steel, brushed + polished |
| Caseback | Screw-down solid stainless steel |
| Bezel | Ceramic, tachymeter scale |
| Crystal | K1 mineral bubble glass, hardened coating |
| Crown | Screw-in |
| Pushers | Screw-in |
| Lume | BGW9 — markers and hands |
| Bracelet | Stainless steel |
| Total length | ~220mm |
| Weight | 128g |
| Water resistance | 100m |
Black — black main dial with orange paint-splash sub-dials and orange chronograph accents. The most restrained of the four — sport tool-watch character with one colour accent.
Orange — orange main dial with black paint-splash sub-dials. Strong black-orange contrast — the most readable at a glance.
Yellow — yellow main dial with black paint-splash sub-dials. Bright and graphic — high visibility dial character.
Light Blue — turquoise/light blue main dial with pink paint-splash sub-dials and pink seconds accents. The most colourful variant — best expresses the paint-splash design concept.
The VK64 is a Seiko Instruments mecaquartz chronograph caliber — the same hybrid architecture as the VK63 used in the Watchdives WD16500 V2 and BERNY 2845M, but with a different sub-dial layout.
Mecaquartz explained: The timekeeping is quartz-controlled for accuracy (±20 seconds/month). The chronograph function is driven by a mechanical module — when you press the start pusher, a mechanical lever train engages, producing the tactile click and mechanical feel of a traditional chronograph pusher. The chronograph seconds hand sweeps at 1/5-second intervals (5 beats per second) rather than ticking once per second.
VK64 vs VK63 layout:
| Feature | VK64 (AD2520) | VK63 (WD16500 V2) |
|---|---|---|
| Chrono layout | Bi-compax (3H and 9H) | Varies by watch |
| 60-min counter | 9H | — |
| 24H indicator | 3H | Varies |
| Date | 6H | No (standard VK63) |
| Sweep chrono | Yes — 1/5 second | Yes — 1/5 second |
The VK64’s date at 6H is the functional addition over the standard VK63 — buyers who want date display alongside chronograph function choose the VK64.
The AD2520’s two sub-dials use an irregular paint-drop shape rather than the standard circular sub-dial found on most chronographs. This is the watch’s primary visual differentiator — the dial reads as a tool watch from a distance but reveals the graphic design element on closer inspection. The colour-matching between main dial and sub-dial accents (orange on orange, pink on light blue) reinforces the palette rather than creating generic contrast.
The ceramic tachymeter bezel resists scratching from normal contact — harder than the steel bezel on the Cadisen C8218. The tachymeter scale allows speed calculation over a known distance using the chronograph: start the chrono when you pass a known distance marker, stop it at the next, and read the speed from the bezel scale.
The domed K1 mineral bubble crystal gives the watch a vintage instrument character — the domed profile creates a slightly magnified view of the centre of the dial. K1 is a hardened mineral glass, more scratch-resistant than standard mineral but below sapphire hardness. The hardened coating adds further surface protection.
| Feature | AD2520 (this page) | WD16500 V2 |
|---|---|---|
| Movement | VK64 mecaquartz | VK63 mecaquartz |
| Date | Yes — 6H | No |
| Crystal | K1 mineral bubble | Flat AR sapphire |
| Bezel | Ceramic tachymeter | Ceramic tachymeter |
| Lume | BGW9 | BGW9 |
| Water resistance | 100m | 100m |
| Dial character | Paint-splash graphic | Classic sport chrono |
| Weight | 128g | — |
Choose AD2520 for date display, the bubble crystal domed look and the graphic paint-splash dial design. Choose WD16500 V2 for the flat AR sapphire crystal and the more traditional sport chronograph dial character.
















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Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.
We are not responsible for any custom fees once the items have been shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.
| Location | *Estimated Shipping Time |
|---|---|
| United States | 5-20 Business days |
| Canada, Europe | 5-20 Business days |
| Australia, New Zealand | 5-20 Business days |
| Central & South America | 5-25 Business days |
| Asia | 5-20 Business days |
| Africa | 5-25 Business days |
Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.
For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.
For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.
If you have any other questions, please contact us and we will do our best to help you out.
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
We do not issue the refund if:
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
If for any reason you would like to exchange your product, perhaps for a different size in clothing, you must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
We do not issue the refund if:
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
The way it pops in the sun, great summer watch
Nice watch for the money