The quick answer.
Seiko 5 Sports Automatic Black Dial SRPD55K1 is a sport watch with case dimensions 42.5 mm diameter × 46 mm lug-to-lug × 13.4 mm thick at A$559.04. We recommend it for a buyer who wants a recognizable black Seiko sports watch, an automatic day-date movement and a steel-bracelet look.
Why it belongs on the shortlist.
The SRPD55K1 keeps the familiar black sports-watch recipe simple: a rotating bezel, luminous markers, steel bracelet and day-date window. We like it as a straightforward mechanical daily watch for someone who wants a bolder silhouette than a dress model without moving into a chronograph or extra complication. Seiko’s official specifications identify the SRPD55 within the SKX series of 5 Sports.
The classic black sports-watch layout stays easy to wear.
A black dial, matching timing bezel and steel bracelet give the SRPD55K1 the familiar Seiko 5 Sports look. Large luminous markers and the day-date window keep the face practical, while the bracelet makes the watch feel more complete than a bare case on a generic strap. It is the version we would shortlist for an everyday mechanical watch with a proper sports-watch outline.
The 4R36 gives you the useful setting features.
Seiko specifies the 4R36 with automatic and manual winding, hacking seconds, a day-date display and an approximately 41-hour reserve. Hacking makes precise time setting easier, and the day-date is genuinely useful for a regular daily wearer. It is a familiar, no-fuss movement package rather than the reason to pay more for an extended-reserve alternative.
The 46 mm length helps balance the larger diameter.
Seiko lists the case at 42.5 mm across, 46 mm from lug to lug and 13.4 mm thick. That combination gives the watch a broad sports profile without an especially long stated span. At 170 g on the listed bracelet, it is still a substantial steel watch; compare the complete dimensions and weight with a bracelet watch you already enjoy.
Hardlex and 100 m define the practical trade-offs.
The SRPD55K1 uses Hardlex, not sapphire, and Seiko specifies 10 bar water resistance with a unidirectional rotating bezel. The manufacturer’s rating is useful for ordinary sports-watch use, but it does not establish independent testing or ISO dive-watch certification. Keep the choice focused on the design and everyday function rather than treating it as a dedicated professional dive instrument.
The retailer price and supplied code are separate.
Watches of Australia listed the SRPD55K1 at A$559.04 on October 22, 2026. The supplied SEBASTIANBASSOL code advertises 10% off, but we have not tested it on this exact Seiko and show no after-code total. Use our Watches of Australia partner link, locate the SRPD55K1 and confirm the discount, warranty terms and final delivered cost at checkout.
The details, at a glance.
- Model
- Seiko 5 Sports · SRPD55K1
- Case dimensions
- 42.5 mm diameter · 46 mm lug-to-lug · 13.4 mm thick
- Case and bracelet
- Stainless steel · 22 mm lug width
- Movement
- Seiko 4R36 automatic with manual winding · 24 jewels
- Power reserve
- Approximately 41 hours, as listed by Seiko
- Functions
- Hacking seconds · day and date · unidirectional rotating bezel
- Crystal
- Hardlex
- Water resistance
- 10 bar / 100 m, as specified by Seiko
- Weight
- 170 g, as specified by Seiko
- Retailer listing
- A$559.04 on Watches of Australia on October 22, 2026
- Reader code
- SEBASTIANBASSOL · supplied 10% off; this exact reference has not been tested
What draws us in
- The black rotating bezel, luminous dial and steel bracelet make the SRPD55K1 easy to place as a daily sports watch
- The 4R36 combines automatic winding, hand-winding, hacking seconds and a useful day-date display
- Seiko publishes the 42.5 mm diameter, 46 mm lug-to-lug and 13.4 mm thickness
Before you choose
The 42.5 mm case and 13.4 mm thickness create a substantial profile, even with the 46 mm lug-to-lug span. Hardlex is the supplied crystal rather than sapphire, and the listed 41-hour reserve is conventional rather than extended. Watches of Australia lists a one-year retailer warranty and a 30-day return window on eligible items; its terms may include conditions or a restocking fee, so check who provides service before ordering.
Who it suits.
A buyer who wants a recognizable black Seiko sports watch, an automatic day-date movement and a steel-bracelet look.
When to choose something else.
Choose a thinner watch with sapphire, a longer reserve or a smaller dial presence if those matter more than the classic Seiko 5 sports design.
Warranty, returns and ownership.
Watches of Australia lists a one-year retailer warranty and a 30-day return window for eligible items, subject to conditions and possible restocking fees. Confirm the current terms and warranty provider for this listing before ordering.
A 42.5 mm case with a manageable 46 mm span.
The published 46 mm lug-to-lug gives you a useful starting point for checking overhang. Use our wrist-fit guide and compare the proportions with a watch you already enjoy wearing.
Watches of Australia partner code and offer terms. Our supplied code is SEBASTIANBASSOL for 10% off. Check the exact model and variant at the store, then confirm eligibility and the final total at checkout.
Where to buy.
Specifications and product photography: Seiko SRPD55 specifications and Watches of Australia product photo (checked October 22, 2026). Find 5 Sports Automatic Black Dial SRPD55K1 at Watches of Australia through our partner link and search for the selected option there. How we choose.
A few good questions.
What is the discount code for the Seiko 5 Sports Automatic Black Dial SRPD55K1?
The Watches of Australia discount code is SEBASTIANBASSOL for 10% off at watchesofaustralia.com.au. We have not tested it on this exact model, so confirm the saving in your order summary. Every code and tested price: https://watchritual.com/promo/watches-of-australia
What movement is in the Seiko 5 Sports Automatic Black Dial SRPD55K1?
Seiko specifies the 4R36 automatic movement with manual winding, hacking seconds, day-date and an approximately 41-hour power reserve.
How large is the Seiko 5 Sports Automatic Black Dial SRPD55K1?
Seiko lists a 42.5 mm diameter, 46 mm lug-to-lug, 13.4 mm thickness and 22 mm lug width.
Does the Seiko 5 Sports Automatic Black Dial SRPD55K1 have a sapphire crystal?
No. Seiko specifies Hardlex for the SRPD55K1.
How water resistant is the Seiko 5 Sports Automatic Black Dial SRPD55K1?
Seiko lists 10 bar water resistance and a unidirectional rotating bezel. The specification does not establish ISO dive-watch certification.
Does code SEBASTIANBASSOL apply to the Seiko 5 Sports Automatic Black Dial SRPD55K1?
Watches of Australia supplies the SEBASTIANBASSOL code for 10% off. We have not tested it on this exact reference, so confirm eligibility and the final total at checkout.
