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Seiko SRPD55 (5 Sports) Specifications
| Reference | SRPD55, SRPD55K1 |
|---|---|
| Case Size | 42.5mm |
| Lug Width | 22mm |
| Lug-to-Lug | 46mm |
| Thickness | 13.4mm |
| Case Material | stainless steel |
| Crystal | Hardlex |
| Water Resistance | 100m |
| Movement | 4R36 (automatic) |
| Bezel | rotating sport bezel |
| Crown | push-pull |
| Case Back | exhibition (see-through) |
| Price Range | $200-$275 |
Compatible Straps for the Seiko SRPD55 (5 Sports)
The SRPD55 (5 Sports) uses a 22mm Lug Width and is compatible with the following strap types.
| Type | Recommended Brand | Why It Works | Price Range | Link |
|---|---|---|---|---|
| NATO/ZULU | Strapcode | Classic look, easy to swap, fits 22mm lugs | $15–$80 | |
| rubber/silicone | Barton | Water-resistant, comfortable for daily wear | $15–$80 | |
| jubilee bracelet | Crafter Blue | Classic bracelet style, comfortable links | $15–$80 | |
| oyster bracelet | Uncle Seiko | Sporty bracelet, solid end links available | $15–$80 | |
| leather | Archer | Dresses up the watch, fits 22mm lugs | $15–$80 | |
| perlon | Crown & Buckle | Lightweight, breathable, adjustable fit | $15–$80 | |
| canvas | Strapcode | Casual, durable field-watch aesthetic | $15–$80 |
Replacement Parts for the Seiko SRPD55 (5 Sports)
| Part | Description | Compatibility Note |
|---|---|---|
| crystal (Hardlex or sapphire upgrade) | Protective cover over the dial | Fits 42.5mm case |
| bezel insert | Outer ring marking | Matches rotating sport bezel configuration |
| chapter ring | Inner ring with minute markings | Specific to 42.5mm case |
| crown with stem | Time-setting knob on case side | push-pull type |
| spring bars | Pins that hold the strap to the case | 22mm, 1.5mm diameter recommended |
| case back gasket | Seal that maintains water resistance | Required for 100m WR rating |
Modding the Seiko SRPD55 (5 Sports)
The SRPD55 (5 Sports) is a popular platform for modding. Here are the most common modifications.
- bezel insert — Swap the stock bezel insert for a ceramic, lumed, or differently colored option.
- crystal upgrade to sapphire — Upgrade the stock mineral/Hardlex crystal to a scratch-resistant sapphire crystal.
- chapter ring — Replace with a contrasting or lumed chapter ring for improved readability.
- dial swap — Install an aftermarket dial for a completely new look.
- strap swap — Upgrade to a premium aftermarket strap or metal bracelet.
Frequently Asked Questions
What lug width is the Seiko SRPD55?
The Seiko SRPD55 has a 22mm lug width.
Are SRPD55 parts compatible with the SRPD51?
Yes, the SRPD51 and SRPD55 share the same case dimensions. All mod parts, straps, and bracelets are interchangeable. The only difference is dial and bezel insert color.
What color is the SRPD55?
The SRPD55 features a blue sunburst dial with a blue bezel insert, making it one of the most popular colorways in the Seiko 5 Sports lineup.