Model:	Sinn 556a	Last Scraped:	Feb. 3, 2025, 4:46 p.m.
Username:	Hyperfuse28	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

[Timestamp and pictures](https://imgur.com/a/4B8LK9W) Condition is used. Includes full kit **Asking for $1100 OBO within the CONUS** **Payment Method**: PayPal F&F, Zelle, or for PayPal G&S invoice (+5% Paid by buyer). **Feedback**: New to the watch subreddit but I have over 200 confirmed trades on /r/mechmarket and a few confirmed trades on /r/hardwareswap

First Posted:	6 months ago	# of Reposts:	2
Starting Price:	$1,200	Price Change:	8% lower

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First Posted	6 months ago	[WTS] Sinn 556a - $1200 Shipped		$1,200
Price Change	6 months ago	[WTS] Sinn 556a		$1,100

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Highest:	$1,275	Lowest:	$975
Median:	$1,100.00	Std. Dev:	±$90.39

Estimated Private Party Value $1,050 — $1,200


	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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