Model:	Sinn 556	Last Scraped:	Jan. 6, 2026, 4:46 p.m.
Username:	stinky_poop_melon	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

FOR SALE Sinn 556 A RS - Matte Black, Red Second Hand, Bracelet/Strap, Box and Papers included Price: $1650 CONUS, shipping included (Negotiable) Condition: Very Good - Minor signs of wear from a desk job Includes: Watch, H link bracelet Bracelet and rubber Barton Strap, Box, Papers, Extra Links Description: Selling my Sinn 556 A RS, a fantastic tool/everyday watch known for its legibility and robust build. The 'A' signifies Arabic numerals, and the 'RS' denotes the striking red second hand, a nod to Sinn's cockpit instruments. Specifications: * Model: Sinn 556 A RS * Case: Satinized Stainless Steel, 38.5mm diameter, 11mm thickness, 45.5mm lug-to-lug, drilled lugs. * Dial: Matte Black with Arabic numerals and indices. * Hands: Sword hands with SuperLuminova, Red second hand. * Crystal: Sapphire crystal (front & back), anti-reflective coating. * Movement: Sellita SW200-1, automatic, 28,800 vph, 26 jewels, hacking, hand-winding, approx. 38-hour power reserve. * Water Resistance: 20 bar (200 meters). * Weight: ~65g (without strap/bracelet). * Bracelet/Strap: Sinn H Link Bracelet with Quick-Adjust clasp an Barton silicon red and black strap Reason for Selling: I bought this watch in 2018 when I got married, now that I have my third child on the way it’s time to sell this.

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Highest:	$2,000	Lowest:	$590
Median:	$1,250.00	Std. Dev:	±$281.32

Estimated Private Party Value $1,050 — $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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