Thumbnail [WTS] Sinn 556 I (December 2022) 1

Model:	Sinn 556	Last Scraped:	Dec. 31, 2025, 6:46 p.m.
Username:	SpiritualFlounder545	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Next up in my ongoing collection purge is my Sinn 556 I, which was purchased new from Watchbuys here in the US in December 2022. I have worn it daily for most of that time. It runs great and is an overall fantastic watch that needs little introduction here. As is usual for any 556 that has been worn, it has a number of small marks and shallow dings throughout the case sides and bezel edge. The sapphire glass is in excellent shape, and the crown screws down smoothly. Beyond the normal cosmetic wear, I have no notes about this reliable piece. **Photos and timestamp are** [**here**](https://imgur.com/a/JYFpPVx)**.** These are now $1,500 plus tax and no longer feature the lovely gold rotor. I’m asking $975 shipped/insured in the United States. Sale includes the watch, a brand-new black NATO strap, and the original guarantee card from Watchbuys. Any questions, please ask!

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Highest:	$2,000	Lowest:	$590
Median:	$1,250.00	Std. Dev:	±$282.70

Estimated Private Party Value $1,038 — $1,450


	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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