For Sale Only: Seiko SBBN045 – Tuna 300m Quartz Dive Watch
If you're looking for a great dive watch with legendary style, the Seiko SBBN045 Tuna is an unbeatable choice. Built for professional divers/fish enjoyers, this Tuna is rated for 300m water resistance and features Seiko’s high-torque 7C46 quartz movement, known for its bulletproof durability.
This is a catch and release for me, I received it on Tuesday. I have reused a couple of pics from the sellers listing with permission as he's a much better photographer than me. Other pics are mine.
Seiko SBBN045 watch
Seiko bracelet (all links)
Seiko box & papers
Warranty card
Additional Nato Straps











If you're looking for a great dive watch with legendary style, the Seiko SBBN045 Tuna is an unbeatable choice. Built for professional divers/fish enjoyers, this Tuna is rated for 300m water resistance and features Seiko’s high-torque 7C46 quartz movement, known for its bulletproof durability.
This is a catch and release for me, I received it on Tuesday. I have reused a couple of pics from the sellers listing with permission as he's a much better photographer than me. Other pics are mine.
Condition:
- Excellent pre-owned condition with minimal signs of wear - the watch was originally purchased in November 2023 from a Canadian AD
- Some barely visible hairlines here and there, pictures are an accurate depiction of the watch's condition
- Crystal and bezel are flawless
- Bezel action is smooth and crisp
- Comes with an OEM Seiko bracelet upgrade (no rubber) and three brand new nato straps
Features & Specs:
- Case Diameter: 47mm (wears smaller due to lug-less design)
- Case Material: Stainless steel with Seiko’s hard coating for added protection
- Movement: Seiko 7C46 quartz (ultra-reliable with a 5-year battery life)
- Water Resistance: 300m
- Bezel: Unidirectional, 120-click, lume pip at 12 o’clock, hard coated stainless steel
- Dial: Matte black with large, ultra-bright LumiBrite markers and hands for superior visibility
- Crystal: Flat Sapphire with anti-reflective coating
- Strap: OEM Seiko bracelet with Ti dive extension (same bracelet as the MM300)
What’s Included:





Price: $1,500 (plus shipping costs)










