The Seiko 5 Sports SRPM09K1 is the HUF limited-edition collaboration that brings a 1970s Time Sonar idea into a modern sports automatic: a translucent green dial that lets you see the day and date discs beneath, set against orange accents and a clean steel bracelet. It is a Seiko 5 Sports piece first—automatic, day-date, recessed crown tradition, and everyday toughness—not a professional dive tool.
Official Seiko specifications put the stainless steel case at 39.4 mm diameter, 11.6 mm thick, and 48.1 mm lug-to-lug, with Hardlex crystal, 10 bar (100 m) water resistance, and about 146 g on the bracelet. Inside is calibre 4R36 with hacking seconds and manual wind. The edition is limited to 7,000 pieces, with “LIMITED EDITION” and a serial number on the case back, plus a green-tinted exhibition view of the movement.
Why this HUF collab is interesting
- Translucent “HUF green” dial: layered look inspired by Seiko’s vintage Time Sonar semi-transparent dials, with the calendar discs visible underneath.
- Wearable sports size: 39.4 mm diameter and 11.6 mm thickness sit closer to modern field/sports comfort than oversized divers.
- Calibre 4R36: automatic with manual winding and hacking; day-date; roughly 41 hours power reserve.
- Hardlex crystal and steel bracelet: daily-driver materials with folding clasp.
- 100 m water resistance: real sports rating for rain and swimming—not 200 m Prospex diver geometry.
- Limited edition of 7,000: serialised case back for collectors who want a numbered collab without leaving the Seiko 5 Sports price band.
Who it suits
Collectors and first automatic buyers who like streetwear collaborations, green dials, and a see-through calendar stack more than a black diver bezel. If you need a thick 200 m dive watch with a coin-edge bezel and sapphire, look at Prospex instead. If you want a distinctive 5 Sports automatic with official Seiko HUF branding and a wearable 39.4 mm case, SRPM09K1 is the reference to check.
Specifications
- Brand: Seiko
- Collection: 5 Sports — HUF Limited Edition
- Reference / SKU: SRPM09 / SRPM09K1
- Movement: Seiko calibre 4R36 automatic (manual wind, hacking seconds)
- Functions: hours, minutes, seconds, day and date
- Power reserve: approx. 41 hours
- Case material: stainless steel
- Case diameter: 39.4 mm
- Case thickness: 11.6 mm
- Lug-to-lug: 48.1 mm
- Crystal: Hardlex
- Dial: translucent green (HUF green) with orange accents; LumiBrite on hands/markers as equipped
- Case back: exhibition with limited-edition marking and serial; green-tinted mineral view of the movement
- Bracelet: stainless steel with folding clasp
- Water resistance: 10 bar / 100 m
- Magnetic resistance: 4,800 A/m
- Weight: approx. 146 g
- Limitation: 7,000 pieces worldwide
Buying the SRPM09K1 in Australia
Chronospride lists this HUF collab for Australian buyers who want verified stock and plain-English specs. Confirm the translucent green dial and limited case-back marking on the product photos. Title paths on the site may still reflect older category URLs; the watch itself is Seiko 5 Sports SRPM09K1, not a Prospex 200 m diver.
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
Frequently asked questions
Is the Seiko SRPM09K1 a 200 m diver?
No. Official Seiko data rates the SRPM09 at 10 bar (100 m) water resistance. It is a Seiko 5 Sports limited collaboration, not a Prospex professional diver. Older site copy that said 200 m was incorrect and has been corrected here.
What movement is inside the SRPM09K1?
Seiko calibre 4R36: automatic winding, manual winding, hacking seconds, and day-date. Expect about 41 hours of power reserve when fully wound.
What are the case dimensions of the SRPM09?
Per Seiko: 39.4 mm diameter, 11.6 mm thickness, 48.1 mm lug-to-lug. Weight is about 146 g on the steel bracelet.
How many SRPM09 pieces were made?
The collaboration is limited to 7,000 pieces, with limited-edition text and an individual serial number on the case back.
What does the HUF green dial look like?
It is a translucent green dial in the spirit of Seiko’s older Time Sonar designs, so the day and date discs can show through the dial layer. Orange accents on the seconds hand and markers add contrast.
Where can I buy the Seiko SRPM09K1 in Australia?
When in stock, Chronospride offers authentic SRPM09K1 pieces with inspection before dispatch and Chronospride’s 12 months warranty handled by our team (terms apply). Free shipping Australia-wide on eligible orders.
| Case-Size | 39.4mm |
|---|---|
| Band-Width | 20mm |
| Lug-Width | 20mm |
| Lug to lug size | 48.1mm |
| Case Thickness | 11.6mm |
| Brand | Seiko |
| UPC | 4954628257383 |
| GTIN | 4954628257383 |
| EAN | 4954628257383 |