All Seiko lines › Astron › NEXTER
Seiko Astron NEXTER chronograph, 44.1 mm (5X83)
7 versions of this watch are on Seiko's own sites right now, across 34 regions. Last checked Nov 13, 2026.
Estimated US price: About $2,205 to $3,300 from Seiko's US list price and its list prices in other countries, converted.
Retailers ask: $3,100 to $3,874 across 3 listings at 2 sellers, checked Nov 13, 2026. See the sellers
Photos are Seiko's own, shown from Seiko's sites. Click a photo to jump to that version.
- Calibre
- 5X83
- Case diameter
- 44.1 mm
- Thickness
- 14.4 mm
- Lug to lug
- 50 mm
- Variants listed now
- 7
- Regions
- 34
Listed means the watch was on an official Seiko regional site or store at the last check. It does not mean it is in stock, and it does not tell us whether Seiko is still making it.
Versions listed now
Same case and movement in every row. What changes is the colour, the strap or bracelet, the finish and where Seiko sells it. Seiko's spec sheets don't state dial colour, so a colour appears only where Seiko's US store tags one.
| Photo | Reference | Colour | Strap / bracelet | Case | Edition | Listed in | Seiko list price | Buy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 | SSH175 Also coded SSH175J1 | Not published | Not stated Clasp: Easy-adjust three-fold clasp with push button release 110 g | Titanium (super-hard coating) | Regular | 32 regions | 3,100 USD USA · Nov 13, 2026 | From 3,100.00 USD Teddy Baldassarre · 1 seller checked | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (37 sites) and its list prices
Buying options (1)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
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 | SSH186 Also coded SBXC186, SSH186J1 | Not published | Not stated Clasp: Three-fold clasp with push button release 110 g | Titanium (super-hard coating) | LimitáltSeiko 145. Yıl Dönümü Limitli Üretim ModeliSeiko 145th Anniversary Limited Editionセイコー創業145周年記念 限定モデル | 31 regions | 3,300 USD USA · Nov 13, 2026 | From 3,495.00 EUR Seiko Boutique Ireland · 2 sellers checked | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (36 sites) and its list prices
Buying options (2)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
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 | SSH177 Also coded SSH177J1 | Not published | Not stated Clasp: Easy-adjust three-fold clasp with push button release 110 g | Titanium (super-hard coating) | Regular | 30 regions | 3,100 USD USA · Nov 13, 2026 | From 3,500.00 EUR Seiko Boutique Ireland · 1 seller checked | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (34 sites) and its list prices
Buying options (1)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
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 | SSH179 Also coded SSH179J1 | Not published | Not stated Clasp: Easy-adjust three-fold clasp with push button release 110 g | Titanium (super-hard coating) | Regular | 29 regions | 3,300 USD USA · Nov 13, 2026 | No seller matched yet | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (33 sites) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SBXC175 | Not published | Not stated 110 g | Titanium Translated from Seiko's regional page | Regular | 1 region Japan | 352,000 JPY Japan · Nov 13, 2026 about $2,205 in US dollars | No seller matched yet | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (1 site) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SBXC177 | Not published | Not stated 110 g | Titanium Translated from Seiko's regional page | Regular | 1 region Japan | 352,000 JPY Japan · Nov 13, 2026 about $2,205 in US dollars | No seller matched yet | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (1 site) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SBXC179 | Not published | Not stated 110 g | 純チタンケース（ スーパー ブラックダイヤシールド） ベゼル：純チタン（ スーパー ブラックダイヤシールド）（表示板：サファイアガラス） Seiko's regional wording | Regular | 1 region Japan | 374,000 JPY Japan · Nov 13, 2026 about $2,340 in US dollars | No seller matched yet | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (1 site) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where to buy
Asking prices for new watches at the last check. Each was in stock at that check, but stock moves, and shipping, tax and import charges are not included. Each reference links to the seller's page.
| Seller | Version | Asking price | Checked |
|---|---|---|---|
| Seiko Boutique Ireland | SSH186 | 3,495.00 EUR about $3,868 | Nov 13, 2026 |
| Seiko Boutique Ireland | SSH177 | 3,500.00 EUR about $3,874 | Nov 13, 2026 |
| Teddy Baldassarre | SSH175 | 3,100.00 USD | Nov 13, 2026 |
Estimated US prices use Seiko's US list price where there is one. Otherwise they are the middle of Seiko's list prices in other countries, converted at rates dated Nov 12, 2026 from ExchangeRate-API (free open endpoint). Those list prices include each country's sales tax, so a converted figure usually runs higher than a US price would. Retailer prices are asking prices on the date shown, not sold prices, and leave out shipping, tax and import charges.
The build
| Movement | GPS solar | Seiko product page |
|---|---|---|
| Functions | Overcharge prevention function Power save function Chronograph up to 12 hours in 1/20 second increments Perpetual calendar to the February 28, 2100 World time function (38 cities) Dual-time function Day display Power reserve indicator Time transfer function (Switching between the main-dial and sub-dial) GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment) Satellite acquisition status display function Reception result display function DST (Daylight Saving Time) Function to prevent the GPS signal reception (in-flight mode) Automatic hand position alignment function | Seiko product page |
| Power reserve / battery | Operating for approx. 6 months (when fully charged), power save: approx. 2 years | Seiko product page |
| Water resistance | 10 bar | Seiko product page |
| Crystal | Dual-curved sapphire crystal | Seiko product page |
| Lug width | 14 mm | Seiko product page |
| Seiko case codes | 5X83-0AP0, 5X83-0AW0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 5X83 and either the same Seiko case code or the same case size. 12 reference codes lead to this page.
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