The quick answer.
Seiko SRPE45 is a 38.5 mm dress watch at $450. We recommend it for someone who wants an expressive dress watch with an automatic movement. The official US store lists this reference as sold out, so check back or compare the alternatives below.
Why it belongs on the shortlist.
A smaller case gives the Mojito-inspired dial room to stand out without making the whole watch oversized. We would pair it with soft tailoring or a simple shirt and let the color do the work.
The details, at a glance.
- Reference
- SRPE45
- Case diameter
- 38.5 mm
- Lug-to-lug
- 45.4 mm
- Thickness
- 11.8 mm
- Lug width
- 20 mm
- Case
- Stainless steel
- Crystal
- Box-shaped Hardlex
- Movement
- 4R35 automatic
- Rated power reserve
- 41 hours
- Water resistance
- 50 m
- Strap / bracelet
- Tan leather, folding clasp
What draws us in
- Patterned green dial with vintage-style numerals
- Compact proportions and a versatile strap width
- Automatic winding with hand-winding capability
Before you choose
Hardlex rather than sapphire, and a leather strap that is better kept away from water.
Who it suits.
Someone who wants an expressive dress watch with an automatic movement.
Think beyond the diameter.
The published 45.4 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 SRPE45?
The official US price checked on October 15, 2026 was $450. The manufacturer listed it as sold out.
What size is the SRPE45?
The SRPE45 has a 38.5 mm case and is 11.8 mm thick, with 20 mm lugs. Its published lug-to-lug is 45.4 mm.
Where can I buy the Seiko SRPE45?
From the Seiko official US store.
