Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 1

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 2

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 3

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 4

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 5

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 6

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 7

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 8

Thumbnail [WTS] Seiko Prospex srp231 Baby Tuna 9

Model:	Seiko Baby Tuna	Last Scraped:	Sept. 9, 2025, 7:17 p.m.
Username:	millhelpot	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

For sale my used Seiko Prospex SRP231 Baby Tuna. First generation and discontinued. A 44mm stainless steel case with black ion plated shroud and bezel, 14mm thick with scratch resistant Hardlex crystal. Caliber 4R36, automatic hacking features with Kanji day date at 3 o’clock, screw down crown at 4 o’clock. Hand and markers covered with LumiBrite, 200m water resistant. It was part of a large rotation but I wear it less these days so time to move on. Works perfectly, comes with original rubber strap and aftermarket metal bracelet shown on pictures. CONUS only, NO trades, PayPal preferred. $280 with shipping.

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Highest:	$1,375	Lowest:	$40
Median:	$425.00	Std. Dev:	±$361.58

Estimated Private Party Value $299 — $800


	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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