The quick answer.
Seiko SRPD55 is a 42.5 mm sport watch 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, so check back or compare the alternatives below.
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
- 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 it suits.
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.
Where to buy.
Specifications and product photography: Seiko official product page. How we choose.
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, with 22 mm lugs. Its published lug-to-lug is 46 mm.
Where can I buy the Seiko SRPD55?
From the Seiko official US store.
