Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 1

Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 2

Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 3

Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 4

Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 5

Thumbnail [WTS] Sinn 556A RS (Full Set 6/25) - 38.5mm 6

Model:	Sinn 556a	Last Scraped:	July 23, 2025, 11:17 p.m.
Username:	ihp7	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

Hi everyone! This a catch and release for me, as it didn’t click with me. Like New Sinn 356A RS, Full Set dated 6/25. I just purchased this last week, sized it, and decided it wasn’t for me. Looking to get **$1599 OBO** with free shipping to CONUS. PayPal FF or Zelle. Would only entertain possible trade for Tudor Ranger, otherwise sales only please. Watch details: • Watch diameter (mm): 38.5 • Watch height (mm): 11.0 • Lug width (mm): 20 • Lug to lug (mm): 45.5 • Weight - head only (grams): 65 • Water resistance: 200 meters • Case finish: Satinized • Case metal: Stainless steel • Case back: Transparent • Dial color: Black • Front crystal: Sapphire • Movement: Automatic mechanical • Calibre: SW200-1 • Strap or bracelet: Bracelet • Quick adjust buckle: Yes • Manufacturer's limited warranty: 2 years Thanks for looking!

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The price of this watch is an outlier for this particular model and not included in the distribution. It may be miscategorized, incorrectly priced, or extremely unique.

Highest:	$1,350	Lowest:	$975
Median:	$1,100.00	Std. Dev:	±$106.23

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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