The quick answer.
Seiko SRPD55 is a 42.5 mm sport watch, listed at $350. We recommend it for a first-time automatic buyer drawn to a larger sports-watch silhouette. The official US store lists this reference as sold out.
Why it belongs on the shortlist.
The rotating bezel and luminous markers give the design a practical rhythm. Consider it for casual daily wear if you prefer a watch with more visual presence than a compact dress piece.
The details, at a glance.
- Reference
- SRPD55
- Case diameter
- 42.5 mm
- Lug-to-lug
- 46 mm
- Thickness
- 13.4 mm
- Lug width
- 22 mm
- Case
- Stainless steel
- Crystal
- Hardlex
- Movement
- 4R36 automatic
- Rated power reserve
- 41 hours
- Water resistance
- 100 m (manufacturer rating)
- Strap / bracelet
- Stainless steel bracelet
What draws us in.
- Useful day and date display
- Black dial with luminous hands and markers
- Accessible entry into mechanical watch ownership
Before you choose.
This is a sports watch, not a substitute for a certified diving instrument. The official US store currently lists it as sold out.
Who we would recommend it to.
A first-time automatic buyer drawn to a larger sports-watch silhouette.
Think beyond the diameter.
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.
Specifications and product photography: Seiko official product page. This editorial assessment uses published specifications. Our approach.
A few good questions.
How much is the Seiko SRPD55?
The official US price checked on October 15, 2026 was $350. The manufacturer listed it as sold out.
What size is the SRPD55?
The SRPD55 has a 42.5 mm case and is 13.4 mm thick. Its published lug-to-lug is 46 mm.
Is there a Watch Ritual discount code for Seiko?
There is no verified Watch Ritual code for Seiko at present. Offers are added only after their terms are confirmed.
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