Seiko Prospex Alpinist Automatic Green Dial Brown Leather Strap Men's Watch SPB121J1
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Seiko Prospex Alpinist Automatic Green Dial Brown Leather Strap Mens Watch SPB121J1
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Made In Japan:
For all you Seiko enthusiasts, this premium timepiece has been made and produced in Japan, indicated by the suffix ‘J’. Seiko watches made in Japan are notoriously hard to obtain outside of Japan due to the highest quality of craftsmanship and astonishing features that come in each individual timepiece. We have a range of Japanese watches here at Watchnation but in limited quantities, so if you are looking to add to your collection then this is the perfect place for you.
Key Features:
| Calibre Number 6R35 | Stainless Steel Case Material | 200m Water Resistant |
| Automatic With Manual Winding Capacity | Sapphire Crystal With Magnifier | Case Thickness 13.2mm |
| Date Display | See Through Case Back | Case Diameter: 39.5mm |
| +25 To -15 Seconds Per Day | Anti-Reflective Coating | Case Length: 46.4mm |
| 24 Jewels | Screw Down Crown | Three-Fold Clasp With Push Button Release |
| Stop Second Hand Function | LumiBrite Indexes And Hands | Rotating Compass Inner Ring |
| Calfskin Leather Strap | Screw Case Back |
The Family: Prospex
Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Seiko are constantly striving to bring ever greater reliability and safety to both professional and recreational divers. The variety in the collection offers different movements like automatic, solar, analogue quartz, solar chronograph and radio sync solar world time chronograph watches.
The Prospex Story:
Scuba-diving became increasingly popular around the 1960’s, an example of this was the formation of the Professional Association of Diving Instructors (PADI) in 1965. Moreover, diving equipment was becoming increasingly reliable, so more people began to dive recreationally. There was of course a crucial need for divers to be able to time their dives. Subsequently, the watch market responded to this necessity by flooding the market with reliable dive watches.
In 1965, Seiko first produced their original dive watch - the 6217. This was the very first Japanese dive watch and it paved the path for future divers that claim to meet Seiko’s Professional Specifications (the Prospex). The original 6217 was notably worn by the 8th Japanese Antarctic expedition. This model featured bidirectional rotating bezel, distinctive and lumed hands, and an easy-to-grip crown.
Although professional divers were still pining for a dive watch that had the capability of going deeper than 300 metres. The Seiko development team went about going to produce a watch which was capable of doing so. The year 1975 marks the release of the first Seiko Prospex, with the ability to be used in 600 metres of depth. It's first diver watch to use a titanium case instead of a standard steel case. It was also the first to use a ceramic shroud for deep-sea diving and the first to use a hybrid analog digital watch with an alarm.
Another achievement for the Prospex family was the L-shape single crystal gasket, which prevented any helium escape valve uanessacry. This was one of the development teams first aims, to prevent a helium resistant watch. There were numerous other milestones that Seiko achieved with the Prospex. Such as in 1986 when Seiko produced a watch that was water resistant to 1000 metres.
The Brand: Seiko
Seiko’s story began in 1881 with the opening of a clock shop in Tokyo, it’s owner was Kintaro Hattori. Eleven years after the opening of his shop, Hattori opened a clock factory with ten employees and it was in 1895 that they began to produce pocket watches. Soon followed by alarm clocks in 1899, and then table clocks in 1902. Then in 1913 Hattori began working on his first wristwatch. The in 1924, 43 years after the initial opening, the brand Seiko was born with the creation of the first Seiko wristwatch.
Seiko established itself throughout the 20th century as being a driving force in the advancements that took place in the watching world. For example, in 1956, Seiko were the producers of the first winding wristwatch made in Japan. Then in 1964, Seiko became the official timer for the Tokyo Olympics. And then most notably Seiko unveiled the first quartz wristwatch, the Astron, in 1969. Marking the beginning of the quartz revolution. Or equally impressive the creation of the world’s first TV watch in 1982. And even more relevant today, with our abhorrent use of non-renewable energy sources, Seiko’s Kinetic. This watch had the ability to generate its own power from the movement of the wearer, it was released in 1988.
Ceaseless determination to innovate in every aspect of the watchmaker’s art is what defines Seiko’s 135-year history. By embracing this ethos, Seiko has been responsible for a string of industry-leading advances in the technology of time. Notably, the creation of the world’s first quartz watch in 1969. The listed technological developments serve as evidence to illustrate the revolutionary impact which Seiko has had on the watchmaking world. They are also markably unique in that they manufacture every aspect of every watch in-house.
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Delivery Information
UK Shipping
We are pleased to offer FREE shipping on all UK orders. All items sent to UK customers are fully insured for added peace of mind.
The table below provides a breakdown of our shipping rates based on the selling price of your order, including VAT and any discounts.
| Selling Price | Royal Mail 48 Tracked |
Royal Mail 24 Tracked & Signed |
Special Delivery Next Day Orders placed Mon–Fri |
Special Sunday Delivery Orders placed before Saturday 12pm |
Royal Mail Special Delivery By 1pm |
|---|---|---|---|---|---|
| £0 to £99.99 | FREE | £4.99 | £7.99 | £7.99 | £9.99 |
| £100 to £499 | N/A | FREE | £7.99 | £7.99 | £9.99 |
| £500 or more | N/A | N/A | FREE | £7.99 | £9.99 |
We know your order is important to you, so we use Royal Mail’s tracked delivery service on all UK orders.
We also offer Royal Mail Special Delivery, which for an additional fee offers guaranteed delivery the next day before 1pm.
*Royal Mail Tracked 24 and Royal Mail Tracked 48 services are 98% accurate but not guaranteed.
UK orders placed before 4pm Monday–Friday are dispatched the same day. Orders placed on Saturday or Sunday are dispatched on the following working day.
We are not open during UK bank holidays. Orders received on bank holidays will be dispatched promptly the next working day.
International Shipping & Duties
We’re pleased to offer worldwide delivery with fully tracked and insured shipping.
To make international delivery clearer, our shipping terms vary depending on the delivery country. Some destinations are shipped with duties and taxes included, while others may require local import charges to be paid before delivery.
DDP Destinations
For orders delivered to the USA, Canada and the European Union countries listed below, we ship on a DDP (Delivered Duty Paid) basis.
This means the price you pay at checkout includes:
- Your goods
- International shipping
- Applicable import duties
- Applicable taxes/VAT
- Customs clearance charges where applicable
Duties and taxes are included at checkout for the countries listed below. This means you should not be asked to pay additional import fees before delivery.
Countries currently shipped with duties and taxes included
North America
- United States
- Canada
European Union / Eurozone
- Austria
- Belgium
- Bulgaria
- Croatia
- Cyprus
- Estonia
- Finland
- France
- Germany
- Greece
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Netherlands
- Portugal
- Slovakia
- Slovenia
- Spain
European Union / Non-Euro Currency Countries
- Czech Republic / Czechia
- Denmark
- Hungary
- Poland
- Romania
- Sweden
If your delivery country is listed above, duties and taxes are included at checkout and you should not be asked to pay additional import duties or taxes before delivery.
Please note that delivery times can still vary if customs require additional checks, but any applicable duties and taxes should already be covered where DDP has been selected and charged at checkout.
Rest of World — DAP
For all other international destinations outside of the countries listed above, orders are shipped on a DAP (Delivered At Place) basis.
This means the price you pay at checkout covers:
- Your goods
- International shipping
It does not include overseas sales tax, import VAT, customs duties, tariffs, or courier clearance/handling fees.
When your order reaches your country, local customs authorities may apply additional charges, including:
- Import VAT or local sales tax
- Customs duties or tariffs
- Courier handling or clearance fees
These charges are set by your country’s customs authority and are payable by you before delivery.
If charges are due, you’ll usually be contacted directly by the courier with a secure link to pay any applicable fees. Once cleared, your parcel will be released for delivery.
Estimated Delivery Times After Dispatch
Customs processing times vary by country and may extend delivery slightly.
If Import Charges Are Not Paid
For DAP shipments, if local import charges, taxes, duties or courier fees are not paid, or if delivery is refused, the parcel may be returned to us.
In this case, we will refund your order minus:
- The original outbound shipping cost
- Any return shipping fees charged to us
- Any customs, duty, tax or clearance fees billed to us by the courier
Estimating Import Costs for DAP Countries
Import VAT, duty and tariff rates vary by country. For an estimate, please contact your local customs authority or use your government’s official import calculator before placing your order.
If your delivery country is listed as a duties and taxes included destination above, your order will be shipped on a DDP basis.
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Frequently Asked Questions
Yes — we are an Authorised Dealer for every brand we sell. All watches come with an official box, papers, and a full manufacturer’s warranty.
Every watch includes a manufacturer warranty. You’ll find more warranty info listed in the product description.
Orders placed before 5pm (Mon–Fri) are dispatched the same day. Order before 12pm on Sat for same-day dispatch. Free UK delivery is available on all orders, and tracking details are provided once shipped.
Yes — you have 14 days from delivery to return or exchange your item, provided it’s unused and in its original packaging.