Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 1

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 2

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 3

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 4

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 5

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 6

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 7

Thumbnail [WTS] King Seiko 5621-7020 No-Date Very Good - $650 8

Model:	Seiko 7A28-7020	Last Scraped:	Aug. 13, 2025, 3:46 a.m.
Username:	Time_not_Wasted	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

For sale is the King Seiko 5621 No-Date men's automatic watch with a stainless steel case. Dial protected by Hardlex crystal. It uses a special No-Date KS mechanical movement that can be manually wound and hacked (the second hand stops when the crown is pulled out). It ticks at 4hz which gives the second hand a smoother sweep than most other Seikos. The movement was hand assembled and regulated. Case and medallion are in very good condition. Newer leather strap & original KS buckle (these are very pricey). Specs are as follows: * Case width: 36.5 (w/o crown) * Condition: Pre-Owned & Very Good * Original KS Buckle * Lug to lug length: 42mm * Lug spacing: 18mm * Thickness: 9.5mm * Hardlex crystal * Movement: 56XX * Production Year: 1971 * WR rating: None * Aftermarket watch strap and Box * No trades, only selling * Free shipping via USPS within CONUS PRICE to SELL: $650 via Zelle or Venmo Buy with confidence. Currently, 145 positive transactions on Reddit and counting. Happy to FaceTime with King Seiko in hand. Thumbs up appreciated if you like this post.

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The price of this watch is an outlier for this particular model and not included in the distribution. It may be miscategorized, incorrectly priced, or extremely unique.

Highest:	$299	Lowest:	$99
Median:	$195.00	Std. Dev:	±$54.28

Estimated Private Party Value $156 — $225


	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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