Seiko SRPJ79 Ultraseven Ultraman: Specs and Buyer Guide

Some Seikos sell on specs alone. This one sells on narrative. The SRPJ79 pairs Seiko’s mass-market 5 Sports recipe with Ultraseven / Ultraman anniversary styling — red and black dial cues, themed hands, and a limited, numbered case back. If you already like Seiko 5 Sports dimensions and want a piece that starts conversations, this reference is the one fans still search for years after launch.

Below is a straight Australian buyer’s read: real specs, who it fits, and how it sits next to regular Seiko 5 Sports and harder Prospex divers.

What the SRPJ79 actually is

Released around the 55th anniversary window for Ultraseven-related celebrations, the SRPJ79 (often listed as SRPJ79K1 depending on market code) is a Seiko 5 Sports automatic with collaboration cosmetics and limited production. Public figures commonly cite a few thousand pieces worldwide — enough that it is rare relative to evergreen SKUs, not unicorn-scarce like some high-end LEs.

Core hardware matches familiar 5 Sports DNA:

• Movement: Seiko 4R36 automatic with hand-winding and hacking seconds
• Jewels / beat: 24 jewels, 21,600 bph (3 Hz)
• Power reserve: about 41 hours
• Case: stainless steel, about 42.5mm diameter, about 13.4mm thick, roughly 46mm lug-to-lug
• Lug width: 22mm
• Crystal: Hardlex (typical for this tier — tough, not sapphire)
• Water resistance: 100 metres
• Functions: time, day, date; bidirectional rotating bezel on the sports case

That is a daily sports watch platform with a themed dial, not a Prospex 200m diver in disguise. Treat water resistance like a 5 Sports: rain, sinks, and careful swimming if gaskets are healthy — not a substitute for a screw-down crown Sumo or Turtle when you are diving.

Spec	SRPJ79 / SRPJ79K1
Collection	Seiko 5 Sports limited collab
Movement	4R36 automatic (manual wind + hacking)
Case diameter	42.5mm
Thickness	~13.4mm
Lug-to-lug	~46mm
Lug width	22mm
Crystal	Hardlex
Water resistance	100m
Why people buy it	Ultraman / Ultraseven design story + LE packaging

Design story without the marketing fog

Ultraman and Ultraseven sit deep in Japanese pop culture. Seiko’s job was to put that colour language on a watch people can actually wear to work. Expect high-contrast black and red, character-inspired hand shapes, and a case back that marks the limited run. Packaging is part of the product for many buyers — keep the box if resale or display matters to you.

If you do not care about the franchise, the dial can still read as a sharp red-accent sports watch. If you do care, the limited back and serial story are the whole point. Either way, buy the watch you will wear — LE status alone is a weak reason to leave it in a drawer.

Who the SRPJ79 suits (and who should skip it)

Good fit if you:

• Already like 42–43mm Seiko 5 Sports proportions
• Want a limited collab without jumping into multi-thousand-dollar premium Seiko
• Prefer automatic day-date convenience over quartz
• Collect story-led pieces alongside regular divers and field watches

Look elsewhere if you:

• Need sapphire crystal and 200m ISO-style dive use — browse Prospex instead
• Want a slim dress watch under 40mm — start with Presage
• Dislike pop-culture dials — a standard black or blue 5 Sports will age more quietly

Buying notes for Australia

Collab Seikos move in waves. Stock can be in-and-out; secondary prices swing with franchise hype. On Chronospride, always check the product page for current quantity and condition notes before you plan around a specific serial. Prefer buying from a local retailer when you want inspected stock and a clear warranty path rather than opaque overseas listings.

After purchase:

• Set day/date carefully following Seiko’s safe time window for the 4R36 (avoid forcing the date during the overnight change period).
• Wind ~20 crowns if the watch has sat stopped, then wear it to keep the rotor topped up.
• Hardlex will take desk dings over years — that is normal at this tier; do not expect sapphire behaviour.
• Keep papers and the special box together if you might resell later.

For broader Seiko shopping context, see Seiko watches for sale Australia and how Seiko stacks up against Orient in our Orient vs Seiko guide.

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.