This listing is a duplicate. A more recent version can be found here.

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 1

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 2

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 3

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 4

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 5

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 6

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 7

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 8

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 9

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 10

Thumbnail [WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced) 11

Model:	Seiko 7A28-7040	Last Scraped:	June 23, 2025, 6:17 p.m.
Username:	shadoww_17	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Greetings watchexchange! Up for sale is a stunning Seiko 7A28-7040, the 7Axx were the first quartz analogue chronograph movements, and they are truly a sight to behold. The 7A Seiko movements are fully jewelled, made of metal, serviceable and provide a regulator switch. The watch is in beautiful condition as pictured, and comes on its original Seiko bracelet with the "Speedmaster" clasp. The bracelet will fit a wrist up to 6.5", which could be extended with a clasp extender. The watch has a 40mm case diameter, and a 43mm l2l. The watch is serviced, and has a fresh battery installed. The bidirectional rotating bezel is functioning, though the resistance is a tad nonlinear. [Timestamp ](https://drive.google.com/file/d/12hDZ1un8DGeL_hj4G8aDi-HEjOHv-I_D/view?usp=drivesdk) The watch is priced to sell at $425 paid via Zelle or Wise and shipped via UPS, please allow 3 to 5 business days of your payment for the watch to be shipped out. Be sure to reach out to me if you have any questions or require additional photographs or information, I entertain requests for custom timestamps. Thanks for looking!

First Posted:	2 months ago	# of Reposts:	3
Starting Price:	$499	Price Change:	37% lower

Hide Reposts (0)

First Posted	2 months ago	[WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $499	$499
Price Change	3 weeks ago	[WTS] Seiko 7A28-7040 Speedmaster - The First Analogue Quartz Chronograph! (Serviced) $425 (Reduced)	$425
Price Change	17 hours ago	[WTS] Seiko 7A28-7040 Speedmaster Analogue Quartz Chronograph! (Serviced) $315 (Clearance)	$315

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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:	$650	Lowest:	$135
Median:	$332.50	Std. Dev:	±$143.59

Estimated Private Party Value $201 — $445


	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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