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🐉 Seiko Prospex Diver 300M – Cal. 6R55 (Ref. 6R55-00J0)
£795.00 GBP
The Seiko Prospex Diver 300M (Ref. 6R55-00J0) represents one of Seiko’s most refined professional dive watches — a perfect fusion of modern Japanese engineering and classic Prospex design DNA.
Driven by Seiko’s in-house Caliber 6R55, this automatic movement provides an impressive 72-hour (3-day) power reserve, ensuring accuracy and reliability both underwater and on land.
Designed to perform in the harshest conditions, the 6R55 Prospex features a solid stainless steel case and bracelet, a sapphire crystal, and a 300-meter water resistance rating.
The iconic wave medallion engraved on the caseback celebrates Seiko’s legendary diving heritage.
Its sleek black dial, luminous markers, and bronze-toned unidirectional bezel make this diver instantly recognizable — rugged yet refined, technical yet elegant.
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Specifications
Model: Seiko Prospex Diver 300M
- Reference: 6R55-00J0
- Movement: Seiko Caliber 6R55 – Automatic, 24 jewels
- Power Reserve: ~72 hours
- Case Material: Stainless steel
- Crystal: Sapphire
- Water Resistance: 300 meters / 30 bar
- Dial: Black textured with LumiBrite indexes
- Bezel: Bronze-tone unidirectional rotating
- Bracelet: Stainless steel with folding clasp
- Functions: Hours, minutes, seconds, date
- Origin: Made in Japan 🇯🇵
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Condition
This example has been worn only once or twice and remains in outstanding, near-mint condition.
It still retains partial protective plastics on the bracelet, a rare detail for a pre-owned Seiko.
The watch is fully functional, keeping excellent time, and comes complete with its original box and warranty papers.
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Why You’ll Love It
A perfect expression of Seiko’s dive-watch mastery — powerful, precise, and deeply rooted in the brand’s professional heritage.
The 6R55 automatic movement ensures reliability and endurance, while the 300 M diver’s build guarantees durability in every environment.
Whether for your collection or daily wear, this Prospex delivers exceptional value and timeless appeal.
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Shipping & Warranty
- Ships from the UK 🇬🇧
- Tracked & fully insured delivery
- 100 % authenticity guaranteed
Frequently asked questions
What is the return policy?
We accept returns within 14 days of delivery, provided the watch is in the same condition as received — unworn, undamaged, and with all original packaging, accessories, and documentation.
Before returning an item, please contact us directly via WhatsApp or email so we can provide return instructions.
Return shipping and insurance are the responsibility of the buyer unless the item is faulty or not as described.
When will I get my order?
We dispatch all orders the next working day after payment is confirmed.
All UK orders are shipped with Royal Mail Special Delivery Guaranteed by 1pm, which ensures next-day delivery after dispatch.
If your order is placed on a Friday or weekend, delivery will take 1–2 extra days.
We always aim for fast and secure delivery — usually your watch arrives within 1–3 working days depending on weekends or public holidays.
All shipments include tracking and full insurance.
Where are your products sourced from?
Our watches come from trusted dealers and collectors all over the world, including Switzerland, Italy, France, Germany, and the UK.
Each piece is authentic, fully inspected, and verified before being offered for sale.
How much does shipping cost?
We use Royal Mail Special Delivery Guaranteed by 1pm for all UK orders.
This service includes tracking, signature on delivery, and full insurance.
Shipping and insurance rates:
• Up to £750 value → £8.95 (standard insured delivery)
• £751–£2,500 value → £14.95 (includes extended insurance)
• £2,501–£5,000 value → custom insured delivery (quoted individually)
All packages are insured for their full value.
International delivery is available upon request — please contact us for a quote.
