Encyclopedia / Sinn / 556 I
No real new deal right now · checked Oct 20, 2026, 1:07 AM ET
$1,150 – $1,850 pre-owned street range
Ref. 556.010 · 22 listings sampled (median ~$1,450)
No grey-market discount: new, it's $1,590 on strap or $2,070 on the H-Link bracelet at WatchBuys, Sinn's US importer (in stock, 1:07-1:09 AM ET). Range = middle 80% of Chrono24 asking prices on the first results page (mix of straps and bracelets). Fixed-price listings only.
What it really costs
| Market | Price | Source |
|---|---|---|
| WatchBuys (Sinn's official US importer), on strap | $1,590 | watchbuys.com |
| WatchBuys, on H-Link bracelet | $2,070 | watchbuys.com |
| Pre-owned (Chrono24 asks) | about $1,150 – $1,850 (median ~$1,450, 22 listings sampled) | Chrono24 |
All prices in USD, checked Oct 20, 2026 (ET). Pre-owned ranges are the middle 80% of asking prices on the first Chrono24 results page for that ref (used and some unworn; sample size shown per row), fixed-price listings only. Grey-market = brand-new from a non-authorized dealer.
Buying guide
Key references
| Ref. | What it is | US retail |
|---|---|---|
| 556.010 | 556 I, black dial (strap / H-Link bracelet) | $1,590 |
Which one I'd pick
Strap or bracelet: WatchBuys lists the 556 I at $1,590 on strap and $2,070 on the H-Link bracelet.
What to check before you buy
- Exact reference: dial colour, size and strap change the price. Match the full ref (556.010) before comparing deals.
- Fakes and red flags: be wary of prices far below the ranges above, stock photos only, or sellers who won't show the caseback, serial and papers.
Alternatives worth a look
- Hamilton Khaki Field Mechanical: Cheaper field watch. (38 mm stainless steel, Calibre H-50, retail $675 (38 mm))
- Tudor Ranger: Step-up tool watch. (39 mm steel, Manufacture Calibre MT5402 (COSC), retail $4,025 (m79950-0001, per Tudor))
- Oris Big Crown ProPilot Date: Another pilot-style automatic. (41 mm Stainless Steel, Oris Calibre 751, retail $2,600 (list price per Jomashop))
History
Sinn is a German watch manufacturer based in Frankfurt am Main, founded in 1961 by flight instructor and pilot Helmut Sinn.
The 556 I is a 38.5 mm steel watch with a black dial, SW200-1 automatic and 200 m water resistance, per WatchBuys.
Specifications
| Brand | Sinn |
|---|---|
| Model | 556 I |
| Key references | 556.010 |
| Launch year | Not confirmed |
| Case | 38.5 mm Stainless Steel |
| Thickness | 11.0 mm |
| Lug width | 20 mm |
| Lug-to-lug | 45.5 mm |
| Crystal | Sapphire front; sapphire display back |
| Dial | Black |
| Movement | SW200-1, automatic |
| Power reserve | Not confirmed |
| Water resistance | 200 m |
| Approx. US retail (Oct 2026) | $1,590 (WatchBuys, Sinn's US importer, strap version) |
Specs from the retailer (Jomashop/WatchMaxx) or brand product page linked above for the main reference; see our research notes for which. Retail prices are list prices, not market value, and change often.
Highlights
- 38.5 mm steel case, 11 mm thick
- SW200-1 automatic
- 200 m water resistance, sapphire front and back
FAQ
How much is the Sinn 556 I?
WatchBuys (Sinn's official US importer), on strap is $1,590. Pre-owned asking prices on Chrono24 mostly ran $1,150 – $1,850 (median ~$1,450), checked Oct 20, 2026, 1:07 AM ET.
What movement does the 556 I use?
The 556.010 checked here uses: SW200-1, automatic.
How big is the 556 I?
38.5 mm Stainless Steel.
Is the 556 I water resistant?
It's rated to 200 m.
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Get the free weekly issuePrices and availability last checked Oct 19, 2026. No affiliate links: I don't earn anything if you buy. Sources are listed in our research notes and linked above.