Seiko 5 Sports Automatic | SRPK33 | Green Dial | 38mm | 10ATM

Powered by a Legendary Workhorse

Owning the SEIKO 5 Sports SRPK33 is owning a piece of manufacture-level engineering at a price that makes horology accessible. Beneath the vibrant green dial beats a robust, in-house automatic movement that embodies Seiko’s long tradition of reliable, serviceable mechanics.

Specifications of the Legendary 7S26 / 4R36 Calibre

• Reference Number: SRPK33K1 (Model SRPK33)
• In-House Automatic Calibre: Seiko 4R36 — automatic with manual winding capability; 21,600 vibrations per hour
• Diashock Protection System: Yes — built-in shock protection for the balance pivot
• Day-Date Complication: Day and date display with quickset function
• Bi-directional Winding Rotor: Efficient bidirectional winding for steady power build
• Number of Jewels: 24 jewels
• Hacking / Stop-Seconds Function: Yes — allows precise time setting
• Exhibition Caseback: See-through screw caseback to admire the movement
• Case & Durability: 38.0 mm stainless steel case and bracelet, uni-directional black rotating bezel, luminous hands and markers, water resistant to 10 bar (100 m)

The Curator's Insight:
From the long-lived 7S26 lineage to the updated 4R36, these calibres are the unsung heroes of modern watchmaking — decades of production have proven them extraordinarily robust and forgiving, perfect for a lifetime of daily wear and learning.

The Most Accessible Piece of In-House Horology

The SRPK33 offers an honest mechanical experience: a genuine Seiko movement, visible through an exhibition back, housed in a compact 38 mm steel case with a striking green dial. It’s a watch that delivers real mechanical character and everyday usability — everything you need to understand and enjoy what a true automatic watch feels like.

This Watch is Ideal For...

• The engineering enthusiast who respects robust, in-house movements
• The aspiring watchmaker or modder who wants a reliable, visible calibre to learn on
• Anyone who values honest mechanics and durable, purpose-built design