Seiko 5 Sports SRPD55
Best for: The default, and it earns it
8.0/10
Keep Score
- Crystal
- 1.3/2.5
- Serviceability
- 2.5/2.5
- Water resistance
- 1.1/1.5
- Warranty
- 1.05/1.5
- Strap standard
- 1/1
- Cost-to-keep transparency
- 1/1
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The 4R36 hacks, hand-winds, runs 41 hours and is almost certainly the most widely serviced mechanical caliber in the United States. Seiko publishes $176 to overhaul one, and recommends doing it about every three years.
42.5mm across, 46mm lug-to-lug, 13.4mm thick and 170g on the bracelet. Check that against your wrist — size is the most common regret with this watch, not specification.
Hardlex rather than sapphire is the compromise and it is the reason the Orient Kamasu one tier up outscores it. What you get back is a service path nobody else can match.
The 4R36 is the most commonly serviced mechanical caliber in the United States and Seiko publishes a flat $176 price to overhaul it. That single fact does more for a twenty-year horizon than any spec on the case.
| Movement | Seiko 4R36, automatic with manual winding, 24 jewels |
|---|---|
| Power reserve | 41 hours |
| Case | 42.5mm stainless steel |
| Lug-to-lug | 46mm |
| Thickness | 13.4mm |
| Lug width | 22mm |
| Crystal | hardlex |
| Water resistance | 100m |
| Warranty | 3 years |
Specifications read from Seiko Watch Corporation product page, SRPD55.


