Seiko 5 Sports Field Series x HUF automatic green dial steel bracelet 39,4 mm

Seiko 5 Sports x HUF – When Heritage Meets the Street

With the SRPM09, Seiko 5 Sports delivers a limited edition that clearly stands apart: a collaboration with HUF, the lifestyle brand founded in 2002 by skateboarder Keith Hufnagel, now a symbol of Californian skate and street culture. The idea was not simply to “decorate” an existing watch, but to create a piece that genuinely blends two identities: Seiko’s watchmaking robustness on one side, HUF’s bold graphic and chromatic language on the other.

To lay the foundations, Seiko turned to its archives and revived a cult model from the 1970s, known among enthusiasts as the “Time Sonar.” This nickname referred to a daring design choice at the time: a dial that partially revealed the mechanics beneath, like a window into the inner workings of the watch. An experimental, distinctly seventies concept that marked Seiko’s history and lends itself perfectly to a modern reinterpretation.

The result: the SRPM09 emerges as a character piece, designed both as an everyday watch and as a true collector’s item.

Design & Dial – The Visual Impact of “HUF Green”

The SRPM09 asserts its identity at first glance thanks to its semi-transparent “HUF Green” dial — an intense neon green that has become a signature of the Californian brand. Developed specifically for this collaboration, this shade never appeared on the original Time Sonar models, making it a genuine reinterpretation rather than a simple reissue.

The translucent dial subtly reveals the day-date disc beneath, a direct nod to the 1970s Time Sonar concept. This visual depth adds dimension and creates a dynamic, almost technical reading of the dial, without compromising legibility.

Seiko structures the composition with:

• A black central section framing the calendar indications
• Applied indexes adding volume and contrast
• An orange triangle at 12 o’clock, echoed by the orange seconds hand for a striking graphic touch
• Hands generously coated with LumiBrite, ensuring excellent visibility in low-light conditions

Unlike previous Time Sonar-inspired versions fitted with rotating bezels, the SRPM09 features a polished fixed bezel, offering a cleaner and more symmetrical look. This choice reinforces its modern Field watch positioning and gives the watch a more compact, balanced silhouette.

The stainless-steel case, alternating brushed and polished surfaces, features well-judged proportions:

• 39.4 mm in diameter
• 11.6 mm in thickness
• 48.1 mm lug-to-lug

Dimensions that place the watch firmly in a versatile category — neither oversized nor overly discreet — perfectly suited to everyday wear.

The SRPM09 does not aim for subtlety; it embraces its visual energy. Yet behind this bold chromatic intensity lies a typically Seiko 5 Sports architecture — functional, robust, and coherent.

Caseback & Exclusive Details – The Collector Dimension

The SRPM09 goes beyond a signature dial by refining the details that are not immediately visible.

Its transparent screw-down caseback is tinted in “HUF Green,” allowing a view of the automatic movement in action. This colored mineral glass creates strong visual coherence with the dial, establishing a chromatic continuity rarely seen on a Seiko 5 Sports.

The caseback is decorated with a graphic inspired by San Francisco, the city where HUF was founded. This detail anchors the watch in the brand’s history and strengthens the narrative behind the collaboration.

It also features:

• The mention “LIMITED EDITION”
• An individually engraved serial number
• An indication of the limited run of 7,000 pieces worldwide

These elements make the SRPM09 more than a stylistic variation — it is a clearly identified, traceable piece with a strong collector positioning.

The presentation matches this exclusivity. The watch is delivered in a special stainless-steel box, accompanied by an original HUF cloth, reinforcing the connection to the streetwear universe and the attention to detail.

This staging completes the experience and confirms that this collaboration was conceived holistically — from design to packaging.

Movement & Tool Watch DNA – Substance Behind the Style

Behind its bold aesthetic, the SRPM09 remains above all a true Seiko 5 Sports, designed for everyday wear.

It is powered by the in-house 4R36 calibre, a proven automatic movement that has equipped the 5 Sports line for years. Reliable, robust, and easy to service, it perfectly embodies Seiko’s philosophy: delivering accessible mechanical watchmaking without compromising durability.

This movement offers:

• Automatic winding with manual-winding capability
• Hacking function for precise time-setting
• Day and date display
• 24 jewels
• A frequency of 21,600 vibrations per hour (3 Hz)
• Approximately 41 hours of power reserve

The transparent caseback allows observation of the rotor in motion, a reminder that beneath the street-inspired design lies a genuine mechanical watch.

In terms of construction, the SRPM09 adheres to the solid standards of the collection:

• 100 meters (10 bar) of water resistance, suitable for active daily use
• Hardlex crystal for durability
• Push-pull crown
• Three-link stainless-steel bracelet with secure triple-fold clasp

This strong technical foundation prevents the watch from becoming a simple “fashion collab.” It remains a versatile tool watch, ready to accompany a dynamic urban lifestyle without hesitation.