Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 1

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 2

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 3

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 4

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 5

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 6

Thumbnail [WTS] Sinn 556i RS (Full set dated 3/25, 2-year warranty) 7

Model:	Sinn 556i	Last Scraped:	June 29, 2025, 7:17 p.m.
Username:	rosster72	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Putting my Sinn 556i RS up for sale as it's not getting the wrist time it deserves (though I'll probably regret selling it down the road). Acquired in a trade with a fellow r/Watchexchange member several months back, worn sparingly since and still in nearly new condition to my eyes. **2-year warranty from Sinn runs through March 2027.** **Full specs:** * Watch diameter (mm): 38.5 * Watch height (mm): 11.0 * Lug width (mm): 20 * Lug to lug (mm): 45.5 * Weight - head only (grams): 65 * Water resistance: 200 meters * Case finish: Satinized * Case metal: Stainless steel * Case back: Transparent * Dial color: Black * Front crystal: Sapphire * Movement: Automatic mechanical * Calibre: SW200-1 Asking a negotiable **$1,099** **shipped** anywhere in the United States. Venmo, Zelle or PayPal F&F accepted. **Open to trades**, please send chat with offer.

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Highest:	$1,549	Lowest:	$799
Median:	$1,190.00	Std. Dev:	±$156.23

Estimated Private Party Value $1,050 — $1,250


	Established:	1961
	Website:	http://www.sinn.de/de/
	Country of Origin:	Germany

Sinn Spezialuhren GmbH is a manufacturer of mechanical wristwatches based in Frankfurt am Main. The company was founded in 1961 by flight instructor and pilot Helmut Sinn under the name ‘Helmut Sinn Spezialuhren’.

Following its foundation in 1961, the company focused on the manufacture of navigation cockpit clocks and pilot chronographs and sold these through direct selling, bypassing retailers. The clocks and watches were produced according to pilot Helmut Sinn’s specifications in the private label sector in Switzerland. By eliminating the trade margin of the retailers, the company was able to offer its clocks and watches at a lower price than through traditional sales channels.

In 1994, Helmut Sinn sold the company to Lothar Schmidt. Following the sale, he acquired Swiss watchmaker Guinand in 1996. In 1998, he set up a new company in Frankfurt am Main. With this company, he offered brand watches from Jubilar, Chronosport and the newly acquired Guinand. In 2006, he retired from business activity. Since handing over the management of the business to his long-standing employee Horst Hassler, he now acts as an advisor to the company. On September 3rd 2016 Helmut Sinn celebrated his 100th birthday.

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