All Seiko lines › Astron › NEXTER
Seiko Astron NEXTER, 42.7 mm (8B63)
2 versions of this watch are on Seiko's own sites right now, across 1 region. Last checked Nov 13, 2026.
Estimated US price: About $1,240, converted from Seiko's list price in JPY.
Retailers ask: $1,100 across 1 listing at 1 seller, 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
- 8B63
- Case diameter
- 42.7 mm
- Thickness
- 11.4 mm
- Lug to lug
- 48.5 mm
- Variants listed now
- 2
- Regions
- 1
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 | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SBXY049 | Not published | Not stated 105 g | Titanium Translated from Seiko's regional page | Regular | 1 region Japan | 198,000 JPY Japan · Nov 13, 2026 about $1,240 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. | ||||||||||||||||||||||||||
 | SBXY053 | Not published | Not stated 105 g | Titanium Translated from Seiko's regional page | Regular | 1 region Japan | 198,000 JPY Japan · Nov 13, 2026 about $1,240 in US dollars | From 1,100.00 USD Japan Select · 1 seller checked | ||||||||||||||||||
Where Seiko lists it (1 site) 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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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 |
|---|---|---|---|
| Japan Select | SBXY053 | 1,100.00 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 | ソーラー電波修正 | Seiko product page |
|---|---|---|
| Functions | 過充電防止機能 即スタート機能 パワーセーブ機能 フルオートカレンダー機能（2099年12月31日まで） ワールドタイム機能（25タイムゾーン） デュアルタイム表示機能 レトログラード式曜日機構 電波修正機能（日本・中国・アメリカ・ドイツ・イギリスの標準電波を受信） 自動受信機能 強制受信機能 受信結果表示機能 受信レベル表示機能 針位置自動修正機能 カレンダー（日付・曜日）機能つき | Seiko product page |
| Power reserve / battery | フル充電時約9ヶ月間 パワーセーブ時約2年 | Seiko product page |
| Water resistance | 日常生活用強化防水（10気圧） | Seiko product page |
| Crystal | サファイア | Seiko product page |
| Seiko case codes | 8B63-0BD0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 8B63 and either the same Seiko case code or the same case size. 2 reference codes lead to this page.
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