The SRPJ47K1 takes Seiko’s 1970s “Time Sonar” archive piece and gives it a bolder colour treatment than its blue sibling — a translucent burnt-orange dial that lets you watch the day and date discs turn underneath, set in the SKX-shaped case that’s become a Seiko 5 Sports mainstay.

The 42.5mm stainless steel case carries a two-tone black-and-orange unidirectional bezel with a 60-minute countup scale, a push-down crown at 4 o’clock flanked by guards, and a tinted see-through screw-down caseback showing the movement. LumiBrite-treated hands and markers handle low-light legibility, with a red-orange central seconds hand tying back into the dial’s colour story.

Inside is Seiko’s in-house 4R36 automatic caliber — hacking, hand-winding capable, 24 jewels, and around 41 hours of power reserve. Water resistance is rated to 100m, and the stainless steel bracelet closes with a three-fold clasp and push-button release.

Key Features
Seiko In-House Cal. 4R36 Automatic – Hacking, hand-winding, ~41hr power reserve
100M Water Resistance – Suitable for swimming and daily wear
Translucent Burnt-Orange “Time Sonar” Dial – Day/date discs visible through the dial
See-Through Caseback – Movement on display
42.5mm Case, 46mm Lug-to-Lug – Compact-wearing despite the sports-diver silhouette
165g Weight – Substantial but balanced on the wrist
Two-Tone Black-and-Orange Bezel – Matches the dial’s colour story

Why Choose the SRPJ47K1?
✔ Bolder colourway than the standard blue Time Sonar, without sacrificing the concept
✔ Automatic movement with hacking and hand-winding in Seiko’s proven 4R36
✔ SKX-inspired case shape that’s earned a loyal following in its own right
✔ 100m water resistance and a see-through caseback for the price
✔ Two-tone bezel and red-orange seconds hand tie the whole dial together

Shipping, Returns & Warranty

🚚 Free insured shipping on Australian orders of $150 and above
🌏 International shipping available, including New Zealand at a flat AU$22
🛡️ Covered by manufacturer warranty, with 15-day change-of-mind returns — see our Warranty & Authenticity and Shipping & Returns pages