Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 1

Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 2

Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 3

Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 4

Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 5

Thumbnail [WTS] Sinn 556i (Full Set, Black Sinn Leather Strap) 6

Model:	Sinn 556i	Last Scraped:	June 19, 2025, 9:16 p.m.
Username:	One_Fan_2572	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

**Description:** **Up for sale is my** ***Sinn 556i*****, the clean and iconic dateless version with a stark black dial and white indices. I purchased this watch here on Reddit from a previous owner. According to the warranty card, it was originally sold in 2014, and I was told it had been serviced (no proof available).** **The watch is in very good condition and running great. Case shows light wear—minor hairlines, nothing deep. Both sapphire crystals (front and display back) are scratch-free. The original Sinn black leather strap has visible wear but is still very usable and comfortable.** **This is a versatile German tool watch with minimalist design, 200m water resistance, and a solid Sellita automatic movement—perfect for everyday wear.** **Specs:** * **Case diameter: 38.5mm** * **Lug-to-lug: 45.5mm** * **Thickness: 11mm** * **Lug width: 20mm** * **Movement: Sellita SW200-1 (automatic)** * **Water resistance: 200m** * **Crystal: Sapphire front and back** * **Full set includes: outer box, inner box, manual, warranty card dated 2014, original Sinn black leather strap with Sinn-signed buckle** **Price: $950 shipped CONUS (OBO). No trades at this time** **Payment: Zelle, Venmo, PayPal F&F, G&S accepted if buyer covers the fee.** **Location: USA – TX** **Thank you for your interest!** **Feel free to ask any questions via PM or chat. Please leave a comment before you do so.**

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Highest:	$1,575	Lowest:	$799
Median:	$1,199.50	Std. Dev:	±$157.59

Estimated Private Party Value $1,050 — $1,250


	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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