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The priceless value of Watches, brought to you by {name}


Masayuki Nakai

Seiko "Ashtray" Professional Diver Titanium 600m 7C46-6010 – March 1986 

A rare and iconic vintage Seiko diver’s watch from the golden era of professional tool watches. Nicknamed the "Ashtray" by collectors due to its oversized, deeply grooved bezel resembling an ashtray, this model represents Seiko’s uncompromising approach to underwater functionality and engineering. 

Finding an Ashtray is hard and if you’re a Seiko nut and have been bitten by the Ashtray bug (alternatively, if you’re reading this and beginning your search), you’d agree that sourcing either variant is difficult!
Yes, they were pricey (¥80,000 in 80s for the -6009) from the start and things haven’t changed on the secondary market. But its' legacy and condition are definitely worth it! 

Specifications:
• Model: Seiko Professional Diver 600m
• Nickname: Ashtray
• Reference: 7C46-6010
• Serial number: 635000 (March 1986)
• Movement: Seiko 7C46 quartz (Japan), high-torque 7-jewel movement developed specifically for professional dive watches
• Case: Titanium Bezel with integrated shock-protective shroud
• Case diameter: 44x45mm (excluding crown)
• Thickness: 15.3 mm
• Water resistance: 600 meters / 60 bar
• Bezel: Uni-directional, oversized with deep ridges for improved grip underwater
• Crystal: Seiko Hardlex mineral glass
• Strap: Original Seiko diver strap with titanium elements 

Condition:
The watch is in excellent vintage condition, showing only minimal signs of wear consistent with careful use. The titanium case and bezel retain their original shape and finish. The original diver strap is included, which significantly adds to the collectibility and authenticity of this example.
Collector's Highlights:
• Rare model with limited production and seldom found in this condition
• Historically significant as one of the earliest Seiko quartz divers rated to 600m
• Iconic design with the "Ashtray" bezel – highly sought after by Seiko enthusiasts
• Robust movement: The 7C46 quartz caliber is still in use in modern Seiko "Tuna" watches due to its exceptional reliability
• Titanium case with protective shroud – a pioneering construction for the time 

A standout piece for any serious Seiko or dive watch collector. This is not just a professional diving instrument, but a piece of horological history from the era when Seiko redefined the limits of quartz technology and case design.

Watch

Seiko - Ashtray - 7C46-6010 - Men - 1986

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Seiko - Ashtray - 7C46-6010 - Men - 1986

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