All Seiko lines › Prospex › Speedtimer
Seiko Prospex Speedtimer chronograph, 42 mm (8A50)
5 versions of this watch are on Seiko's own sites right now, across 5 regions. Last checked Nov 13, 2026.
Estimated US price: $895 to $1,050 Seiko US list price.
Retailers ask: $740 to $1,095 across 4 listings at 3 sellers, checked Nov 13, 2026. See the sellers
Black
Photos are Seiko's own, shown from Seiko's sites. Click a photo to jump to that version.
- Calibre
- 8A50
- Case diameter
- 42 mm
- Thickness
- 12.9 mm
- Lug to lug
- 48.3 mm
- Variants listed now
- 5
- Regions
- 5
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 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SFJ003 Also coded SFJ003P1 | Not published | Not stated Clasp: Three-fold clasp with push button release 152 g | Stainless steel | Regular | 4 regions Australia, Hungary, Ireland, USA | 925 USD USA · Nov 13, 2026 | From 989.00 EUR Seiko Boutique Ireland · 2 sellers checked | |||||||||||||||
Where Seiko lists it (4 sites) and its list pricesBuying 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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 | SFJ005 Also coded SFJ005P1 | Not published | Not stated Clasp: Three-fold clasp with push button release 152 g | Stainless steel | Limitált | 4 regions Australia, Hungary, Spain, USA | 925 USD USA · Nov 13, 2026 | From 740.00 USD Long Island Watch · 1 seller checked | |||||||||||||||
Where Seiko lists it (4 sites) and its list pricesBuying 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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 | SFJ007 Also coded SFJ007P1 | Black Seiko USA store tag | Not stated Clasp: Three-fold clasp with push button release 152 g | Stainless steel (hard coating) | Limitált | 4 regions Australia, Hungary, Spain, USA | 950 USD USA · Nov 13, 2026 | From 760.00 USD Long Island Watch · 2 sellers checked | |||||||||||||||
Where Seiko lists it (5 sites) and its list pricesBuying 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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 | SFJ001 Also coded SFJ001P1 | Not published | Not stated Clasp: Three-fold clasp with push button release 152 g | Stainless steel | Regular | 3 regions Australia, Hungary, USA | 895 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | |||||||||||||||
Where Seiko lists it (3 sites) and its list pricesBuying 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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 | SFJ009 Also coded SFJ009P1 | Not published | Not stated Clasp: Three-fold clasp with push button release 152 g | Stainless steel | LimitáltSeiko Watchmaking 110th Anniversary Limited Editions | 3 regions Australia, Hungary, USA | 1,050 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | |||||||||||||||
Where Seiko lists it (3 sites) and its list pricesBuying 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 |
|---|---|---|---|
| Long Island Watch | SFJ005 | 740.00 USD | Nov 13, 2026 |
| Long Island Watch | SFJ007 | 760.00 USD | Nov 13, 2026 |
| Seiko Boutique Ireland | SFJ003 | 989.00 EUR about $1,095 | Nov 13, 2026 |
| Seiko USA | SFJ007 | 950.00 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 | Solar | Seiko product page |
|---|---|---|
| Functions | Overcharge prevention function Chronograph up to 60 minutes in 1/100 second increments Battery life warning function | Seiko product page |
| Power reserve / battery | Operating for approx. 6 months (when fully charged) | Seiko product page |
| Water resistance | 10 bar | Seiko product page |
| Crystal | Curved sapphire crystal | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 8A50-00A0, 8A50-00B0, 8A50-00C0, 8A50-00D0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 8A50 and either the same Seiko case code or the same case size. 10 reference codes lead to this page.
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