
Seiko Mod Daytona Cosmograph Rubber Strap | Black

Watch Box & Adjustment Tools Included
Hand-Assembled & Ready to Wear — No Parts to Install


Watch Specifications
The Seiko Mod Daytona Cosmograph Rubber Strap Black is a custom Seiko Mod designed for those who seek distinction and daily performance. With its bold aesthetic and mechanical reliability, it's a statement piece that goes beyond standard watches.
Each Seiko Mod Daytona Cosmograph Rubber Strap Black is hand-assembled using carefully selected components like sapphire crystal, stainless steel case, and a precise automatic movement. Whether you're a seasoned collector or first-time buyer, this Seiko Mod is crafted for impact.
Seiko Mod Daytona Cosmograph Rubber Strap Black – Features
- Case: 316L stainless steel – 41 mm (VK63 cosmograph)
- Thickness: 13 mm
- Dial: Black Daytona style – Cosmograph layout
- Crystal: Sapphire, anti-reflective treated
- Case back: Solid steel case back
- Crown: Screw-down
- Hands: Daytona-style – Luminova
- Bracelet: Rubber strap – 20 mm width
- Wrist size: Adjustable from 14.5 to 22 cm (sizing tool included)
- Water resistance: Up to 100 m
Every Seiko Mod Daytona Cosmograph Rubber Strap Black is built with care and tested for long-term precision and durability. Personal, solid, and timeless.
Assembled by hand. Built just for you.
Japanese Movement
Movement: Seiko VK63
Functions: Quart
Accuracy: ±20 seconds per month
Power Supply: Battery (3 years lifespan)
Shipping & Delivery Times
Risk-Free Guarantee
If you’re not satisfied with your watch, you can return it within 30 days. This guarantee starts from the moment your package is delivered.
Assembly
It takes 3 to 5 business days to assemble and test your watch, ensuring optimal performance.
Shipping
Once assembled, your watch will be shipped, which typically takes 8 to 12 business days.
Overall Timeline
The entire process, from assembly to delivery, takes approximately 10 to 15 business days (Monday to Friday). This ensures every watch meets our high standards before reaching you.
Cost
Shipping is completely free.
Enjoy a worry-free experience with guaranteed quality and service!
Choose options

Wear the exceptional. Without the luxury price.
Every Chrono Mod watch is hand-assembled and inspired by legendary timepieces — giving you the look, feel, and presence of luxury, without the markup.
The secrets of your watch


Need help?
FREQUENTLY ASKED QUESTIONS
A Seiko mod is a one-of-a-kind timepiece, custom-made and impossible to find in traditional retail stores.
Handcrafted by experts, these watches combine original Seiko components with carefully selected non-Seiko parts, chosen for their quality and style.
Please note that these are not official Seiko products. Our company is entirely independent and has no affiliation with Seiko or any other brand.
We use NH35, NH70, and NH72 automatic mechanical movements for our modified Seiko watches. These movements, manufactured by Seiko, are renowned for their reliability and accuracy, providing an exceptional watchmaking experience for our customers. Each of these movements is carefully selected to ensure long-lasting performance and outstanding quality, adding invaluable value to our modified Seiko watches.
Each watch undergoes a series of rigorous tests to ensure its performance and reliability:
- Water Resistance: A thorough check of the water resistance to ensure perfect sealing.
- Demagnetization: A demagnetization process to preserve the proper functioning of sensitive components.
- Chronometer Adjustment: Precise adjustment of the watch to achieve accuracy within -5 to +5 seconds per day.
These quality checks are carried out with care before shipping, ensuring you receive a watch that is ready to use, reliable, and high-performing.
For every order, we provide you with the necessary tool to adjust the bracelet to your wrist yourself.
This allows you to easily customize the fit at home, at no extra cost.
Delivery of In-Stock Watches
- Shipping within 48 business hours.
Delivery of Made-to-Order Watches
- Assembly: 10 to 15 business days.
- Shipping within 48 hours.
Accessory Delivery
- Shipping within 48 business hours.
Tracking and Shipping Fees
- Tracking number provided upon shipment.
- Shipping fees vary based on weight and destination.
Returns and Exchanges
- Please refer to our Return Policy.