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Free delivery on watches above £84

Seiko Alpinist SPB155J1 Prospex Alpinist Watch

  • Seiko Alpinist SPB155J1 Prospex Alpinist Watch

Stainless steel automatic gents watch with date

£682.- Incl 20% vat
● Shipping within 3 up to 5 working days
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  • Free delivery on watches above £84
  • 60-day return period
  • Official dealer of Seiko
Orders before 17:00 are shipped today!

Product description

This Seiko watch has a case made of Steel silver with a diameter of 39.5 mm and is fitted with a Steel silver strap. Inside the case lies a Seiko Instruments Inc. movement and the watch features a Single anti-reflective sapphire crystal.

The watch is 20ATM. This means the watch is suitable for diving. The watch comes with 3 Year Warranty.

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Specifications

Alternative article number SPB155
Ean 4954628236074
Diameter 39.5 mm
Water Resistant 20 Bar (Dive)
Warranty 3 Year Warranty

Functions

Time hours - Analogue hand
Calendar Date - Window
General information
Ean 4954628236074
Brand Seiko
Series Alpinist
Name Prospex Alpinist
Year 2020 Fall / Winter
Display Type analog
Swiss Made No
Water Resistant 20 Bar (Dive)
Dial colour Green
Hand colors (h-m-s) Gold, Gold, Gold
Case information
Case code 6R35-01B0
Diameter 39.5 mm
Case Thickness 13 mm
Material Stainless steel
Case Shape Round
Case colour Silver
Back case material Stainless steel
Back Case Screwed case back
Material crystal Single anti-reflective sapphire
Glass Diameter 31.00
Crown Screw crown
Movement information
Movement part nr. 6R35 ( See specifications )
Movement Brand Seiko Instruments Inc.
Swiss movement No
Display Type analog
Mechanism Mechanical Automatic
Power reserve 70
Frequency 21.600
Jewels 24
Hackable YES
Skeletonized No
Strap information
Strap material Stainless steel
Extra info (free text) Stainless Steel Bracelet
Strap width 20 mm
Lug width 20 mm
Strap width at the clasp 18 mm
Strap colour Silver
Clasp Type Deployment clasp with push buttons
Clasp colour Silver
Custom sizing? YES
Mount type Push pins
Straight strap mount YES
Suitable for wrist size 160 mm - 220 mm
Original strap Strap Seiko M0TZ411J0

Print & Fit

Wondering how the watch fits your wrist? Use the print and fit function!

Time
hours Analogue hand
minutes Analogue hand
Seconds Analogue hand
Calendar
Date Window

User experiences

  1. "Very nice design, retro style"
    "Zeer mooi ontwerp, retro stijl"
    Jan Oudshoorn · October 27, 2025

    Since 26 August, this watch has been in my possession. Bought it because I wanted a nice mechanical movement in addition to the quartz movements from Citizen, Seiko and Sinn that run very accurately. Read many reviews and then often criticised the Alpinist's lack of accuracy. For the first few weeks I wore it daily and there was a deviation of about a minute a week. Fine. Then I started wearing it day and night. Set date and time correctly on October 1. Reference radio-controlled clock. With the onset of winter time on 26 October, set it again. The watch was then a scant minute ahead. In daily practice, this difference is hardly noticeable. So the Seiko runs very well. I am happy and satisfied with it. HWG's service, which I have had to use in the past, is very good. All in all, highly recommended.

    • Case rather small by modern standards (39.5 mm), good wearing comfort
    • No weaknesses

    Sedert 26 augustus is dit horloge in mijn bezit. Gekocht omdat ik wel eens en mooi mechanisch uurwerk wilde hebben naast de kwarts uurwerken van Citizen, Seiko en Sinn die heel nauwkeurig lopen. Veel reviews gelezen en vaak is er dan kritiek op het gebrek aan nauwkeurigheid van de Alpinist. De eerste weken droeg ik hem dagelijks en was er een afwijking van ca. een minuut per week. Prima. Daarna ben ik hem dag en nacht gaan dragen. Op 1 oktober datum en tijd goed ingesteld. Referentie radio gestuurde klok. Met het ingaan van de wintertijd op 26 oktober opnieuw ingesteld. Het horloge liep toen een krappe minuut voor. In de dagelijkse praktijk is dit verschil nauwelijks waarneembaar. De Seiko loopt dus heel goed. Ik ben er blij en tevreden mee. De service van HWG, waar ik in het verleden wel eens gebruik van heb moeten maken, is zeer goed. Al met al een aanrader.

    • Kast voor moderne begrippen tamelijk klein (39,5 mm), goed draagcomfort
    • Geen zwakke punten
Seiko Alpinist SPB155J1 Prospex Alpinist Watch