ROYAL OAK WATCH MOD COLLECTION

Explore Seiko Mod Royal Oak builds with an octagonal bezel and an integrated-bracelet silhouette.

Explore Seiko Mod Royal Oak builds with an octagonal bezel and an integrated-bracelet silhouette. Choose skeleton, blue or panda chronograph styling, then compare your exact configuration.

Seiko Mod Royal Oak — a shape that leads the design

A Seiko Mod Royal Oak starts with the outline: an octagonal bezel, angular case geometry and a bracelet that feels part of the design. If you choose a watch by how it sits with a shirt cuff or catches the eye across a table, this collection gives you several ways to make that outline your own.

The design reference is the Audemars Piguet Royal Oak and its integrated-bracelet sports-watch silhouette. These are independent ModTime builds, hand-assembled to order. ModTime is not affiliated with Audemars Piguet or Seiko. The appeal is the particular combination you choose: dial, finish, bracelet profile and movement function working together.

Start with the dial. A silver skeleton build brings visible mechanical detail to the center of the watch; a blue dial gives the same angular shape a different focal point. Prefer a quieter face? Compare the black-dial versions. Rose-gold-tone and all-black finishes change the character again, so look at the whole watch rather than the dial color alone.

A Seiko Royal Oak chronograph mod is a different route through the collection. The panda configuration adds a contrasting subdial layout and a timing function. It is worth comparing alongside the automatic builds if that layout is what first caught your attention; the product page identifies the movement and options for the exact version.

Choose the visual direction first, then open the product page to confirm the specification and configuration. If you are comparing integrated-bracelet shapes, explore the Nautilus-style ModTime collection as well. The rounded outline offers another direction while keeping your choice focused on the finished watch.

Choose your build

Useful buying guides

Frequently asked questions

Who builds these Seiko Mod Royal Oak watches?

ModTime hand-assembles these independent custom builds to order. The design is inspired by the Audemars Piguet Royal Oak; ModTime is not affiliated with Audemars Piguet or Seiko.

What is the difference between skeleton and chronograph versions?

Skeleton builds emphasize visible mechanical detail. Chronograph versions add a timing function and a subdial layout. Check the movement and configuration on the particular product page; the collection includes different movement types.

Which version should I choose for a blue dial?

Start with the Ocean Blue build, then compare the finish and dial details with other blue versions in the grid.

How do I choose the water-resistance option?

Use the product's current selector to choose the standard 3 ATM configuration or the paid 5 ATM option, then check the displayed price for that build.

Where do I confirm the size, bracelet and final configuration?

Open the product you want and check its listed size, bracelet and available options. Compare the photographs of that exact version before adding it to your cart.

Need Help?

Frequently Asked Questions

What is a custom ModTime watch?

A ModTime custom watch is an independently assembled watch built from compatible components around a chosen movement, case, dial and bracelet.

The term "MOD" comes from "modification". These modifications are generally made for those who wish to personalize their watch according to their specific tastes or needs. Modifications can vary considerably, from minor aesthetic changes to more complex technical revisions.

What makes Seiko watches particularly amenable to modification is the wide availability of spare parts. This abundance of components enables a wide range of customization, making each ModTime custom watch unique.

Which movements do we use?

At ModTime, we work exclusively with reliable, high-grade Seiko movements — trusted by watch enthusiasts worldwide for their precision and durability.

Each movement is carefully selected and tested by our watchmaker to ensure optimal performance and a smooth mechanical experience.

We use:

  • NH34 Automatic — for our GMT Mods
  • NH35 Automatic — for date dial builds
  • NH38 Automatic — for clean dial designs without a date
  • VK63 Mecha-Quartz — for chronograph models


Every ModTime watch is powered by a movement chosen for its accuracy, longevity, and craftsmanship — the foundation of every timepiece we create.

Can I adjust the watch size myself?

Absolutely! Every ModTime timepiece comes with a FREE complimentary premium adjustment kit, allowing you to resize your bracelet easily and safely at home.

Each tool is designed for precision and comfort — the same way our watches are crafted.

If you prefer, your local watchmaker can also assist you with the adjustment — our bracelets use standard Seiko-compatible links, making professional resizing simple and effortless.

Can I choose a clean or dial-marked version?

Yes — absolutely! Every ModTime timepiece can be fully customized to match your personal vision.

If you prefer a clean, minimalist dial without visible dial branding, our watchmakers will assemble your piece accordingly during the hand-crafting process.

Simply include your preference in the order notes at checkout, and we’ll ensure your watch is built exactly the way you want it — refined, personal, and uniquely yours.

Can I design my own watch?

Absolutely. At ModTime, every timepiece can be crafted to your personal vision — from the bracelet and case to the dial, hands, and finishing details.

You can even add your own logo or initials, turning your watch into a truly one-of-a-kind creation.

If you’d like to design a fully personalized ModTime piece, simply reach out to us on WhatsApp. Our watchmakers will guide you through every step of the customization process — from concept to final assembly.

Shipping Time and Costs

Free tracked shipping to the US. Import costs are included; there are no import surcharges on delivery. See checkout for the final order total.

Each watch is hand-assembled within 4-6 days to ensure the highest quality and attention to detail.

Once completed, the shipping time is 7-12 days, depending on your location. While we aim for prompt delivery, some variations may occur based on the destination.

Please note: Due to the current global shipping conditions, especially related to parcel traffic in and out of the US, delivery times may occasionally be slightly extended. However, we do everything on our side to ensure the fastest possible handling and dispatch.

Please note that delivery times may vary depending on the destination country.

Are the watches water resistant?

ModTime watches use variant-dependent water-resistance options such as 3 ATM or 5 ATM. 3 ATM is intended for daily splashes and rain. 5 ATM gives more everyday margin, but custom watches should still be kept away from swimming, bathing, diving and prolonged water exposure unless a specific model is explicitly rated for that use.

No answer matches that yet. Try a broader word — or reach our watchmakers on WhatsApp and we’ll help directly.

Explore related collections: GMT watches · integrated bracelet watches · open heart watches · chronograph watches · watch travel cases · all watches

Questions before ordering? Read the ModTime FAQ or contact ModTime.