[WTS] Seiko Prospex 1965 Heritage Diver - SPB421

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Model:	Seiko	Last Scraped:	Jan. 15, 2026, 6:46 p.m.
Username:	tnflyfisher	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

For sale is a Seiko Prospex 1965 Heritage Diver - SPB421 - Alaska Moulins Stainless Steel with curved sapphire crystal with AR coating on inner surface, 200 meter WR, with bracelet (20mm lug width) Very cool looking deep blue textured dial that is patterned to evoke the icy surface of the Alaska Moulins. CASE DIMENSIONS: THICKNESS: 13.2mm DIAMETER: 40.5mm LENGTH: 47.6mm MOVEMENT: Caliber 6R35 21,600 vibrations per hour 24 jewels Power reserve: approximately 70 hours CONDITION: Excellent condition, purchased 8/12/25. Three year Seiko warranty is transferrable. Bracelet was rarely worn with it as I had it on strap most of the time. I like the watch a lot, but it had taken a backseat to some others and didnt get as much wrist time lately. Price: $900 USD. Insured Ground shipping included through UPS within CONUS. PayPal FF or Venmo only. Please ask for more photos or videos.

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	Established:	1881
	Website:	http://seikousa.com/index.php
	Country of Origin:	Japan

The company was founded in 1881, when Kintarō Hattori opened a watch and jewelry shop called "K. Hattori" (服部時計店 Hattori Tokeiten?) in the Ginza area of Tokyo, Japan. Eleven years later, in 1892, he began to produce clocks under the name Seikosha (精工舎 Seikōsha?), meaning roughly "House of Exquisite Workmanship". According to Seiko's official company history, titled "A Journey In Time: The Remarkable Story of Seiko" (2003), Seiko is a Japanese word meaning "exquisite" or "success" ("exquisite" is usually written 精巧 from Chinese jīngqiǎo, while the meaning "success" is usually written 成功 from Chinese chénggōng).

Seiko is perhaps best known for its wristwatches, all of which were at one time produced entirely in-house. This includes not only major items such as microgears, motors, hands, crystal oscillators, batteries, sensors, LCDs but also minor items such as the oils used in lubricating the watches and the luminous compounds used on the hands and the dials.

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