Black Sea Diver
Build your own mechanical dive watch — and wear the result.
The Black Sea Diver pairs a 40 mm stainless-steel case with a rotating black dive bezel, luminous hands and markers, and a black-and-grey NATO strap. Choose a black or white dial to make the finished watch your own.
Inside is the proven Seiko NH35 automatic movement. You assemble the watch yourself using the included components, tools and step-by-step guidance — no previous watchmaking experience required.
Once correctly assembled and sealed, the case is designed for 100 m water resistance, creating a rugged automatic watch that is as satisfying to wear as it is to build.
✓ No previous experience required
✓ Parts and assembly tools included
✓ Guided step-by-step videos
✓ Ships from Switzerland
✓ U.S. import charges prepaid
Gift of the Year 2026 Nominee
Seiko NH35 automatic movement
A proven and reliable Japanese automatic movement that powers the watch you assemble yourself.
Each Horologic watchmaking kit includes:
The movement arrives assembled and the crown stem is already cut to the correct length.
For full shipping, delivery and return information, refer to our Shipping & Returns policy.
Add a second strap
Your kit includes the above displayed strap. Add an extra strap or bracelet to change the character of your watch after the build.
Your Horologic kit arrives with the components, tools, and guidance needed to assemble your own automatic watch at home.
The kit is designed for careful beginners. You do not need prior watchmaking experience, but the build requires patience, focus, and a steady hand. Follow the guidance step by step and take your time.
If you enjoy careful hands-on work and following detailed instructions, this kit is designed for you.
REAL WATCH ASSEMBLY, MADE APPROACHABLE
The mechanical movement arrives fully assembled and the crown stem is already cut to the correct length. You take it from there — fitting the dial and hands, casing the movement, installing the crown, closing the case and attaching the strap or bracelet.
It's genuine watch assembly, using real watchmaking tools and components, but designed so that you can enjoy the process without previous experience.
Position the dial, find midnight and carefully install each of the three hands.
Place your completed movement into the case, refit the pre-cut crown and stem, and secure the caseback.
Attach the strap or bracelet, set the time and date, and put on a watch you assembled yourself.
Horologic is made for people who want to give more than another object. The experience of building the watch becomes part of the story behind it — making it especially meaningful for birthdays, Father's Day, Christmas, retirements, or anyone who loves mechanical things.
Explore the full Horologic collection and compare our curated Sportsman, Diver, and Heritage watchmaking kits.
Explore all buildsEverything you need to know about our watchmaking kits
Yes, absolutely. You'll assemble a fully functional automatic watch with a genuine self-winding movement. Once completed, it keeps time just like any luxury automatic watch.
No. Horologic kits are curated, inspected, packed, and shipped from Switzerland. Components are sourced internationally and include a Japanese automatic movement.
Not at all. Our kits are designed for beginners. Each kit includes detailed step-by-step instructions, and all the specialized tools you need are included in the box.
Most people complete their watch in 2-4 hours. It's a relaxing, meditative process—perfect for a weekend afternoon or evening project.
Don't worry. Our instructions are clear and easy to follow. If you do encounter any issues, our support team is here to help, and we offer replacement parts if needed.
Absolutely. Our kits make exceptional gifts for watch enthusiasts, makers, and anyone who appreciates craftsmanship. Each kit arrives in premium packaging ready to gift.
Yes, we ship worldwide from Switzerland. Shipping times vary by destination, but most orders arrive within 5-10 business days.
