Own a piece of diving history with the SEIKO SCUBAMASTER M726-5A10. Originally released in 1990, this legendary model was the world's first computerized diver's watch, capable of calculating dive tables and tracking depth. Its iconic "Tuna-like" chunky digital aesthetic makes it a standout piece for any vintage Seiko collection.
This item is the watch head only (no band), making it an ideal candidate for a restoration project or for pairing with your favorite NATO or rubber strap. Despite its age, the essential electronics—buttons and backlight—are confirmed to be functional, which is increasingly rare for these early digital dive computers.
Pre-owned / Vintage
Cosmetic: The watch shows visible scratches and signs of wear on the case and plastic bezel, consistent with its age and use as a professional tool (please see photos).
Cleaning: The exterior has been professionally cleaned.
Note: This is the watch head only; the original strap is not included.
Brand: SEIKO
Model: SCUBAMASTER
Reference Number: M726-5A10
Movement: Digital (Quartz)
Case Material: Stainless Steel / Plastic Bezel
Water Resistance: 200m (Original rating, currently untested)
Origin: Made in Japan
Accessories: None (Watch head only)
Button Operation: Confirmed. All buttons are responsive.
Light: Confirmed. The backlight is operational.
Depth/Pressure Sensor: Untested. Accuracy of diving functions cannot be guaranteed.
Water Resistance: Untested. Due to its vintage nature, we recommend replacing the gaskets and pressure testing before any water exposure.
Accuracy: Keeping time as a standard digital watch.
We try our best to show the item’s condition through photos, but please understand that there may be small imperfections we might miss.
As these are pre-owned items, some may have a slight odor or be a bit out of shape.
Also, due to differences in lighting and monitor settings, the actual color may look slightly different from the pictures. Please check the photos carefully before purchasing!
Import duties, taxes, and charges are not included in the item price or shipping cost. These fees are the buyer's responsibility.
Please check with your country’s customs office to determine what these additional costs will be before bidding or buying.
We do not mark items as gifts or declare lower values on customs forms. Doing so is against international laws.
We accept eBay Payment only.
Please make your payment within 5 days of your purchase.
If payment is not received within 5 days, an unpaid item case may be opened automatically unless otherwise arranged.
We offer a 30-day return policy on all our items.
If you’re not satisfied, simply return the item in the same condition as you received it. Return shipping is the buyer’s responsibility.
Please note: customs duties, insurance, and handling fees are non-refundable.
Before starting a return, kindly send us a message through eBay so we can assist you properly.
To avoid any misunderstandings, please check the photos and description carefully before purchasing.
We’re a licensed professional seller based in Japan, specializing in collector’s items and secondhand goods.
All items we sell are guaranteed authentic and pre-owned.
We keep photo records of all items before shipping. If any fraudulent activity such as item-swapping is detected, we will take strict action in accordance with policies and regulations.
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