Model:	Sinn 556i	Last Scraped:	March 15, 2025, 12:47 a.m.
Username:	mistertran	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Hey Everyone, Up for sale is the venerable Sinn 556i. As seen in the photos, overall condition is solid. The crystal is clean and scratch free, allowing it to showcase the inky black dial. Package includes inner and outer boxes, warranty card (February 2023), adjustment tool, and OEM h-link bracelet (sized to a 7.25 inch wrist with 2 additional links). Asking for $1,250 (Zelle only) including insured shipping within CONUS. Have a good day! * Album:https://imgur.com/a/sinn-556i-25ZHtCG * Timestamp:https://imgur.com/f2reRPZ Specs: * Case diameter (mm): 38.5 * Case thickness (mm): 11.0 * Case lug width (mm): 20 * Lug to lug (mm): 45.5 * Water resistance: 200 meters * Case metal: Stainless steel

Reputation and Feedback

This seller did not provide contact information in the listing description. You must be a member of Reddit to send them a private message. If you are not already a member, request a new account at https://www.reddit.com/register/.

No feedback was found for this seller. Although this does not mean the seller is untrustworthy, you should exercise caution in dealing with them.

Also keep in mind: TimeZone, Chronotrader, Seiko & Citizen Watch Forum, and Wrist Sushi do not have dedicated feedback forums.

Highest:	$1,700	Lowest:	$690
Median:	$1,194.50	Std. Dev:	±$188.24

Estimated Private Party Value $1,000 — $1,281


	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.

View Brand Page

Affiliate links: WatchPatrol may receive a commission if you purchase a product from eBay.

	Sinn 556.I Black Dial 38mm Automatic Mens Watch Excellent A5223 watch-jpn (23288) eBay (JP) • Buy It Now	$1,304.73
	sinn u50 watch matte finish black dial jamewilso_93 (52) eBay (US) • Buy It Now	$2,600.00
	Sinn 556i Automatic Watch German Made felipmaldonadofa_0 (67) eBay (US) • Buy It Now	$1,500.00
	SINN 556.I.B SW09494 rybrand-shop (144) eBay (JP) • Buy It Now*	$2,145.10
	Sinn 556.15153 Automatic Black dial date Water resistant to 20 ATM 37.6mm kumswatch (213) eBay (JP) • Buy It Now	$1,478.95