Prospex SPB143
The Prospex SPB143 by Seiko brings a sporty character to the wrist without being loud. The 40.5 mm stainless steel case houses the Seiko 6R35 calibre (automatic, approx. 70 hrs power reserve). Sapphire crystal and 200 m water resistance put the watch in practical context; it is worn on the stainless steel bracelet in everyday life and outdoors. A watch that keeps up with both activity and the office.
All technical data comes from manufacturer information and is checked against manufacturer or retailer pages before inclusion. The editorial rating is our assessment of technology, build quality and value for money in the class, not a lab test. The guide price is based on the recommended retail price; you can always see the current price in the shop. More about how we work →
The Prospex SPB143 specifications in detail
The movement, case and features determine how a watch performs in everyday life. Here are the key specifications of the Prospex SPB143 at a glance, as in the manufacturer's data sheet.
Suits you if...
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Frequently asked questions about the Prospex SPB143
Here you will find short, clear answers about the Prospex SPB143 from Seiko. The details help you judge size, movement, water resistance and price. That way you can decide more quickly whether the watch suits you.
How big is the Prospex SPB143?
The Prospex SPB143 measures 40.5 mm in diameter. That puts the watch in the versatile middle range; what matters is that the lugs do not extend beyond your wrist.
Which movement powers the Prospex SPB143?
The Prospex SPB143 is powered by the Seiko 6R35 calibre with automatic winding and around 70 hours of power reserve. It winds itself via the rotor as you wear it.
Is the Prospex SPB143 water resistant?
The Prospex SPB143 is pressure-tested to 200 m, which makes it suitable for swimming, snorkelling and most dives. The metre rating is a test pressure, not a diving depth.
How much does the Prospex SPB143 cost?
The Prospex SPB143 (ref. SPB143J1 · 40.5 mm) has a guide price of approx. €1,250, based on the manufacturer's recommended retail price. You can find the current price directly at our partner shop Amazon.de.
What occasions is the Prospex SPB143 suited to?
The Prospex SPB143 fits best for everyday wear, outdoors and sport. This follows from its sporty look, its size and its sapphire crystal and stainless steel bracelet.
Which watches are similar to the Prospex SPB143?
Kamasu by Orient, Prospex Turtle SRPE93 by Seiko and Mako II by Orient go in a similar direction. They share the watch type or a related concept and are worth comparing before you buy.
Related guides
More guidance on the Prospex SPB143: these guides go deeper on watch type, technology and buying decisions and help you compare with other models.