Thumbnail [WTS] Sinn 556A RS + BONUS Sinn strap. 1

Thumbnail [WTS] Sinn 556A RS + BONUS Sinn strap. 2

Thumbnail [WTS] Sinn 556A RS + BONUS Sinn strap. 3

Model:	Sinn 556a	Last Scraped:	Jan. 12, 2026, 11:16 p.m.
Username:	ThetaKing1	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Let’s be honest… the regular 556A is a fantastic watch, but it’s also a little too well behaved. If you’ve ever looked at one and thought, “I wish this had just a little more personality,” that’s exactly where the 556A RS comes in. Same rock-solid Sinn build, same clean design — but with that red seconds hand adding just enough spice to keep things interesting without turning it into a circus. This one is in excellent condition, runs great, and comes as a true full kit with the grey strap. I’m also including a bonus genuine black leather Sinn strap, so you can go sporty during the day and classy at night without spending extra. It wears perfectly as a daily, disappears on the wrist, and somehow works with literally everything — jeans, office, weekend chaos, you name it. If you want a 556 that doesn’t look like it’s headed to a board meeting, this is your watch. $1395 + label takes this home!

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Highest:	$1,599	Lowest:	$975
Median:	$1,262.50	Std. Dev:	±$163.82

Estimated Private Party Value $1,125 — $1,338


	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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