Thumbnail [WTS] Sinn 556i MOP 556 Mother of Pearl on H-Link Bracelet 1

Model:	Sinn 556i	Last Scraped:	July 13, 2025, 5:17 a.m.
Username:	JasonTsay	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

**Timestamp and Photos:** [https://imgur.com/a/sinn-556i-mop-watchexchange-wnGjTm5](https://imgur.com/a/sinn-556i-mop-watchexchange-wnGjTm5) Selling my **Sinn 556i MOP** — arguably the best version of the watch, with applied (instead of printed) indices and a highly dynamic mother of pearl dial that shifts between flat black and vivid green/purple hues. A perfect GADA watch with German design and rugged build quality. **Case size:** 38.5mm **Lug-to-lug:** 45.5mm **Thickness:** 11mm **Lug width:** 20mm **Condition:** Shows some signs of wear throughout the case/bracelet (see photos). Great candidate for daily wear without having to baby it. Comes with the original box and papers. Sized to my 6" wrist but includes enough links for a 7.6" wrist Asking **$1,549 shipped OBO** via Zelle or PayPal F&F. No trades. CONUS only. Feel free to DM with questions or offers. Thanks!

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Highest:	$1,575	Lowest:	$690
Median:	$1,170.00	Std. Dev:	±$174.94

Estimated Private Party Value $1,043 — $1,275


	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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